./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:38:26,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:38:26,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:38:26,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:38:26,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:38:26,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:38:26,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:38:26,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:38:26,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:38:26,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:38:26,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:38:26,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:38:26,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:38:26,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:38:26,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:38:26,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:38:26,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:38:26,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:38:26,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:38:26,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:38:26,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:38:26,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:38:26,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:38:26,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:38:26,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:38:27,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:38:27,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:38:27,002 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:38:27,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:38:27,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:38:27,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:38:27,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:38:27,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:38:27,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:38:27,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:38:27,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:38:27,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:38:27,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:38:27,014 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:38:27,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:38:27,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:38:27,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:38:27,053 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:38:27,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:38:27,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:38:27,055 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:38:27,055 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:38:27,055 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:38:27,055 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:38:27,056 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:38:27,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:38:27,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:38:27,056 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:38:27,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:38:27,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:38:27,057 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:38:27,057 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:38:27,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:38:27,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:38:27,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:38:27,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:38:27,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:38:27,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:38:27,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:38:27,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:38:27,060 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:38:27,060 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:38:27,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:38:27,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:38:27,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:38:27,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:38:27,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:38:27,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:27,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:38:27,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:38:27,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:38:27,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:38:27,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:38:27,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:38:27,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:38:27,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:38:27,063 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2021-11-03 05:38:27,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:38:27,353 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:38:27,356 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:38:27,358 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:38:27,359 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:38:27,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-03 05:38:27,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/edd629598/4c0b33af59b14390a6a70401a1925275/FLAG833b110e6 [2021-11-03 05:38:28,114 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:38:28,114 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-03 05:38:28,156 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/edd629598/4c0b33af59b14390a6a70401a1925275/FLAG833b110e6 [2021-11-03 05:38:28,276 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/edd629598/4c0b33af59b14390a6a70401a1925275 [2021-11-03 05:38:28,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:38:28,279 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:38:28,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:28,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:38:28,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:38:28,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:28" (1/1) ... [2021-11-03 05:38:28,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f395efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:28, skipping insertion in model container [2021-11-03 05:38:28,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:28" (1/1) ... [2021-11-03 05:38:28,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:38:28,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:28,911 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-03 05:38:28,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:28,932 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) [2021-11-03 05:38:28,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b560504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:28, skipping insertion in model container [2021-11-03 05:38:28,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:28,933 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:38:28,935 INFO L168 Benchmark]: Toolchain (without parser) took 654.52 ms. Allocated memory is still 109.1 MB. Free memory was 67.9 MB in the beginning and 69.1 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:38:28,936 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:38:28,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 652.03 ms. Allocated memory is still 109.1 MB. Free memory was 67.7 MB in the beginning and 69.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:38:28,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 109.1 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 652.03 ms. Allocated memory is still 109.1 MB. Free memory was 67.7 MB in the beginning and 69.1 MB in the end (delta: -1.4 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2568]: 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH --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 cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:38:31,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:38:31,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:38:31,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:38:31,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:38:31,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:38:31,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:38:31,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:38:31,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:38:31,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:38:31,241 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:38:31,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:38:31,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:38:31,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:38:31,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:38:31,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:38:31,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:38:31,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:38:31,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:38:31,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:38:31,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:38:31,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:38:31,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:38:31,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:38:31,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:38:31,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:38:31,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:38:31,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:38:31,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:38:31,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:38:31,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:38:31,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:38:31,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:38:31,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:38:31,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:38:31,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:38:31,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:38:31,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:38:31,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:38:31,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:38:31,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:38:31,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:38:31,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:38:31,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:38:31,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:38:31,335 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:38:31,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:38:31,336 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:38:31,336 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:38:31,336 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:38:31,336 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:38:31,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:38:31,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:38:31,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:38:31,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:38:31,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:38:31,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:38:31,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:38:31,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:38:31,340 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:38:31,340 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:38:31,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:38:31,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:38:31,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:38:31,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:38:31,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:38:31,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:38:31,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:38:31,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:31,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:38:31,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:38:31,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:38:31,343 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:38:31,344 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:38:31,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:38:31,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:38:31,345 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:38:31,345 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc5b9f71a5434758faa1f6f3febe6f12c158e9feff610b938ef9d4658acd21ff [2021-11-03 05:38:31,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:38:31,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:38:31,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:38:31,748 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:38:31,749 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:38:31,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-03 05:38:31,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/8fb1835ce/01ca111562954120bad49e0876f14898/FLAG5cf3448b4 [2021-11-03 05:38:32,547 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:38:32,548 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c [2021-11-03 05:38:32,580 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/8fb1835ce/01ca111562954120bad49e0876f14898/FLAG5cf3448b4 [2021-11-03 05:38:32,764 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/data/8fb1835ce/01ca111562954120bad49e0876f14898 [2021-11-03 05:38:32,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:38:32,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:38:32,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:32,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:38:32,775 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:38:32,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:32" (1/1) ... [2021-11-03 05:38:32,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e01518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:32, skipping insertion in model container [2021-11-03 05:38:32,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:38:32" (1/1) ... [2021-11-03 05:38:32,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:38:32,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:33,512 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-03 05:38:33,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:33,537 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:38:33,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:38:33,695 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-03 05:38:33,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:33,700 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:38:33,808 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_12314c6c-af5f-4674-ac5b-caa9846a23f6/sv-benchmarks/c/product-lines/elevator_spec9_product09.cil.c[70349,70362] [2021-11-03 05:38:33,809 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:38:33,838 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:38:33,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33 WrapperNode [2021-11-03 05:38:33,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:38:33,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:38:33,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:38:33,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:38:33,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:33,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:38:34,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:38:34,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:38:34,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:38:34,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:38:34,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:38:34,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:38:34,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:38:34,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (1/1) ... [2021-11-03 05:38:34,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:38:34,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:38:34,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:38:34,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:38:34,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:38:34,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:38:34,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:38:34,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:38:42,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:38:42,487 INFO L299 CfgBuilder]: Removed 493 assume(true) statements. [2021-11-03 05:38:42,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:38:42 BoogieIcfgContainer [2021-11-03 05:38:42,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:38:42,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:38:42,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:38:42,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:38:42,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:38:32" (1/3) ... [2021-11-03 05:38:42,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e16b015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:38:42, skipping insertion in model container [2021-11-03 05:38:42,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:38:33" (2/3) ... [2021-11-03 05:38:42,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e16b015 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:38:42, skipping insertion in model container [2021-11-03 05:38:42,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:38:42" (3/3) ... [2021-11-03 05:38:42,500 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product09.cil.c [2021-11-03 05:38:42,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:38:42,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-03 05:38:42,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:38:42,567 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 [2021-11-03 05:38:42,567 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-03 05:38:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 2320 states, 2314 states have (on average 1.904494382022472) internal successors, (4407), 2319 states have internal predecessors, (4407), 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) [2021-11-03 05:38:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-03 05:38:42,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:42,670 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] [2021-11-03 05:38:42,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:42,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1344261416, now seen corresponding path program 1 times [2021-11-03 05:38:42,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:42,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455205094] [2021-11-03 05:38:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:42,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:42,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:42,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:42,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:38:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:38:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:43,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:43,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:43,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455205094] [2021-11-03 05:38:43,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455205094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:43,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:43,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:38:43,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413612819] [2021-11-03 05:38:43,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:38:43,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:43,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:38:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:38:43,440 INFO L87 Difference]: Start difference. First operand has 2320 states, 2314 states have (on average 1.904494382022472) internal successors, (4407), 2319 states have internal predecessors, (4407), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-03 05:38:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:43,553 INFO L93 Difference]: Finished difference Result 2339 states and 4430 transitions. [2021-11-03 05:38:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:38:43,587 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-03 05:38:43,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:43,626 INFO L225 Difference]: With dead ends: 2339 [2021-11-03 05:38:43,627 INFO L226 Difference]: Without dead ends: 2316 [2021-11-03 05:38:43,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:38:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-03 05:38:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2316. [2021-11-03 05:38:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2311 states have (on average 1.9017741237559498) internal successors, (4395), 2315 states have internal predecessors, (4395), 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) [2021-11-03 05:38:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 4395 transitions. [2021-11-03 05:38:43,811 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 4395 transitions. Word has length 37 [2021-11-03 05:38:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:43,811 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 4395 transitions. [2021-11-03 05:38:43,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2021-11-03 05:38:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 4395 transitions. [2021-11-03 05:38:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:38:43,823 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:43,824 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] [2021-11-03 05:38:43,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:44,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:44,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1119069577, now seen corresponding path program 1 times [2021-11-03 05:38:44,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:44,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777519701] [2021-11-03 05:38:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:44,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:44,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:44,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:44,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:38:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:44,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:44,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:44,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777519701] [2021-11-03 05:38:44,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777519701] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:44,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:44,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:38:44,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771486790] [2021-11-03 05:38:44,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:44,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:44,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:44,582 INFO L87 Difference]: Start difference. First operand 2316 states and 4395 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-03 05:38:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:44,761 INFO L93 Difference]: Finished difference Result 4619 states and 8771 transitions. [2021-11-03 05:38:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 05:38:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:44,778 INFO L225 Difference]: With dead ends: 4619 [2021-11-03 05:38:44,779 INFO L226 Difference]: Without dead ends: 2316 [2021-11-03 05:38:44,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-11-03 05:38:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2316. [2021-11-03 05:38:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2311 states have (on average 1.8991778450887062) internal successors, (4389), 2315 states have internal predecessors, (4389), 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) [2021-11-03 05:38:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 4389 transitions. [2021-11-03 05:38:44,900 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 4389 transitions. Word has length 39 [2021-11-03 05:38:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:44,900 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 4389 transitions. [2021-11-03 05:38:44,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2021-11-03 05:38:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 4389 transitions. [2021-11-03 05:38:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 05:38:44,907 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:44,913 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] [2021-11-03 05:38:44,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:38:45,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:45,126 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:45,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1891407277, now seen corresponding path program 1 times [2021-11-03 05:38:45,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:45,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386486439] [2021-11-03 05:38:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:45,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:45,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:45,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:45,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:38:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:38:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:45,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:45,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:45,754 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:45,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386486439] [2021-11-03 05:38:45,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386486439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:45,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:45,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:38:45,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808136735] [2021-11-03 05:38:45,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:38:45,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:45,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:38:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:38:45,756 INFO L87 Difference]: Start difference. First operand 2316 states and 4389 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) [2021-11-03 05:38:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:45,980 INFO L93 Difference]: Finished difference Result 4583 states and 8694 transitions. [2021-11-03 05:38:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:38:45,982 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 [2021-11-03 05:38:45,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:45,996 INFO L225 Difference]: With dead ends: 4583 [2021-11-03 05:38:45,996 INFO L226 Difference]: Without dead ends: 2289 [2021-11-03 05:38:45,999 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 [2021-11-03 05:38:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-03 05:38:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2021-11-03 05:38:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2284 states have (on average 1.8971103327495622) internal successors, (4333), 2288 states have internal predecessors, (4333), 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) [2021-11-03 05:38:46,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4333 transitions. [2021-11-03 05:38:46,089 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4333 transitions. Word has length 44 [2021-11-03 05:38:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:46,089 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 4333 transitions. [2021-11-03 05:38:46,090 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) [2021-11-03 05:38:46,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4333 transitions. [2021-11-03 05:38:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-03 05:38:46,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:46,093 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, 1] [2021-11-03 05:38:46,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:46,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:46,309 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -291718581, now seen corresponding path program 1 times [2021-11-03 05:38:46,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:46,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17592491] [2021-11-03 05:38:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:46,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:46,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:46,314 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:46,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:38:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:38:46,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:46,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:46,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:46,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17592491] [2021-11-03 05:38:46,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17592491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:46,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:46,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:38:46,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819159760] [2021-11-03 05:38:46,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:38:46,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:38:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:46,915 INFO L87 Difference]: Start difference. First operand 2289 states and 4333 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-03 05:38:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:47,055 INFO L93 Difference]: Finished difference Result 4556 states and 8638 transitions. [2021-11-03 05:38:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:38:47,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 45 [2021-11-03 05:38:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:47,071 INFO L225 Difference]: With dead ends: 4556 [2021-11-03 05:38:47,071 INFO L226 Difference]: Without dead ends: 2289 [2021-11-03 05:38:47,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:38:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-11-03 05:38:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2021-11-03 05:38:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2284 states have (on average 1.8944833625218913) internal successors, (4327), 2288 states have internal predecessors, (4327), 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) [2021-11-03 05:38:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 4327 transitions. [2021-11-03 05:38:47,177 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 4327 transitions. Word has length 45 [2021-11-03 05:38:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:47,177 INFO L470 AbstractCegarLoop]: Abstraction has 2289 states and 4327 transitions. [2021-11-03 05:38:47,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2021-11-03 05:38:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 4327 transitions. [2021-11-03 05:38:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:38:47,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:47,180 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, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:47,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:47,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:47,394 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:47,395 INFO L85 PathProgramCache]: Analyzing trace with hash -233795494, now seen corresponding path program 1 times [2021-11-03 05:38:47,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:47,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825626003] [2021-11-03 05:38:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:47,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:47,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:47,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:47,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:38:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:38:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:47,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:48,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:48,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825626003] [2021-11-03 05:38:48,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825626003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:48,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:48,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:38:48,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397802898] [2021-11-03 05:38:48,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:38:48,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:48,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:38:48,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:38:48,131 INFO L87 Difference]: Start difference. First operand 2289 states and 4327 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2021-11-03 05:38:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:48,345 INFO L93 Difference]: Finished difference Result 4550 states and 8621 transitions. [2021-11-03 05:38:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:38:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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 50 [2021-11-03 05:38:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:48,362 INFO L225 Difference]: With dead ends: 4550 [2021-11-03 05:38:48,362 INFO L226 Difference]: Without dead ends: 2286 [2021-11-03 05:38:48,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:38:48,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-03 05:38:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2021-11-03 05:38:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2281 states have (on average 1.893467777290662) internal successors, (4319), 2285 states have internal predecessors, (4319), 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) [2021-11-03 05:38:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4319 transitions. [2021-11-03 05:38:48,486 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4319 transitions. Word has length 50 [2021-11-03 05:38:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:48,486 INFO L470 AbstractCegarLoop]: Abstraction has 2286 states and 4319 transitions. [2021-11-03 05:38:48,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 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) [2021-11-03 05:38:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4319 transitions. [2021-11-03 05:38:48,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:38:48,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:48,489 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:48,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:48,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:48,704 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 970953866, now seen corresponding path program 1 times [2021-11-03 05:38:48,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:48,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887703875] [2021-11-03 05:38:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:48,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:48,708 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:48,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:38:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:49,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:38:49,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:49,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:49,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:49,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887703875] [2021-11-03 05:38:49,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887703875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:49,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:49,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:38:49,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196366547] [2021-11-03 05:38:49,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:38:49,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:38:49,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:38:49,512 INFO L87 Difference]: Start difference. First operand 2286 states and 4319 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-03 05:38:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:51,506 INFO L93 Difference]: Finished difference Result 9200 states and 17379 transitions. [2021-11-03 05:38:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:38:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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 51 [2021-11-03 05:38:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:51,552 INFO L225 Difference]: With dead ends: 9200 [2021-11-03 05:38:51,552 INFO L226 Difference]: Without dead ends: 6954 [2021-11-03 05:38:51,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:38:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6954 states. [2021-11-03 05:38:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6954 to 2290. [2021-11-03 05:38:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2285 states have (on average 1.8919037199124726) internal successors, (4323), 2289 states have internal predecessors, (4323), 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) [2021-11-03 05:38:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 4323 transitions. [2021-11-03 05:38:51,745 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 4323 transitions. Word has length 51 [2021-11-03 05:38:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 2290 states and 4323 transitions. [2021-11-03 05:38:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-11-03 05:38:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 4323 transitions. [2021-11-03 05:38:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:38:51,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:51,749 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:51,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:51,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:51,965 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1787389742, now seen corresponding path program 1 times [2021-11-03 05:38:51,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:51,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921324068] [2021-11-03 05:38:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:51,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:51,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:51,968 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:52,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:38:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:38:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:38:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:38:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:38:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:38:52,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:38:52,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921324068] [2021-11-03 05:38:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921324068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:38:52,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:38:52,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:38:52,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064078253] [2021-11-03 05:38:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:38:52,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:38:52,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:38:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:38:52,746 INFO L87 Difference]: Start difference. First operand 2290 states and 4323 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-03 05:38:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:38:59,308 INFO L93 Difference]: Finished difference Result 6249 states and 11752 transitions. [2021-11-03 05:38:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:38:59,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 52 [2021-11-03 05:38:59,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:38:59,353 INFO L225 Difference]: With dead ends: 6249 [2021-11-03 05:38:59,353 INFO L226 Difference]: Without dead ends: 4915 [2021-11-03 05:38:59,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:38:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4915 states. [2021-11-03 05:38:59,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4915 to 4224. [2021-11-03 05:38:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4224 states, 4219 states have (on average 1.8954728608675042) internal successors, (7997), 4223 states have internal predecessors, (7997), 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) [2021-11-03 05:38:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 7997 transitions. [2021-11-03 05:38:59,622 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 7997 transitions. Word has length 52 [2021-11-03 05:38:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:38:59,624 INFO L470 AbstractCegarLoop]: Abstraction has 4224 states and 7997 transitions. [2021-11-03 05:38:59,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-11-03 05:38:59,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 7997 transitions. [2021-11-03 05:38:59,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:38:59,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:38:59,628 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:38:59,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:38:59,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:38:59,842 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:38:59,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:38:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash 536310902, now seen corresponding path program 1 times [2021-11-03 05:38:59,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:38:59,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [664536945] [2021-11-03 05:38:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:38:59,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:38:59,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:38:59,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:38:59,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:39:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:39:00,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:00,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:00,656 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:00,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [664536945] [2021-11-03 05:39:00,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [664536945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:00,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:00,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:39:00,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293432674] [2021-11-03 05:39:00,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:00,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:00,659 INFO L87 Difference]: Start difference. First operand 4224 states and 7997 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-03 05:39:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:02,362 INFO L93 Difference]: Finished difference Result 7952 states and 14955 transitions. [2021-11-03 05:39:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:39:02,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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 53 [2021-11-03 05:39:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:02,373 INFO L225 Difference]: With dead ends: 7952 [2021-11-03 05:39:02,373 INFO L226 Difference]: Without dead ends: 4676 [2021-11-03 05:39:02,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:39:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-11-03 05:39:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 4127. [2021-11-03 05:39:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4127 states, 4122 states have (on average 1.8791848617176128) internal successors, (7746), 4126 states have internal predecessors, (7746), 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) [2021-11-03 05:39:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 7746 transitions. [2021-11-03 05:39:02,551 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 7746 transitions. Word has length 53 [2021-11-03 05:39:02,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:02,552 INFO L470 AbstractCegarLoop]: Abstraction has 4127 states and 7746 transitions. [2021-11-03 05:39:02,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-03 05:39:02,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 7746 transitions. [2021-11-03 05:39:02,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:39:02,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:02,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:02,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 05:39:02,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:02,770 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:02,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1267828138, now seen corresponding path program 1 times [2021-11-03 05:39:02,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:02,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574723035] [2021-11-03 05:39:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:02,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:02,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:02,772 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:02,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:39:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:39:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:03,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:03,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574723035] [2021-11-03 05:39:03,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574723035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:03,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:03,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:39:03,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781545758] [2021-11-03 05:39:03,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:39:03,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:03,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:39:03,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:39:03,584 INFO L87 Difference]: Start difference. First operand 4127 states and 7746 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-03 05:39:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:04,890 INFO L93 Difference]: Finished difference Result 29413 states and 55432 transitions. [2021-11-03 05:39:04,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:39:04,891 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 54 [2021-11-03 05:39:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:04,981 INFO L225 Difference]: With dead ends: 29413 [2021-11-03 05:39:04,981 INFO L226 Difference]: Without dead ends: 25322 [2021-11-03 05:39:04,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:39:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25322 states. [2021-11-03 05:39:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25322 to 7721. [2021-11-03 05:39:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7721 states, 7716 states have (on average 1.8838776568170037) internal successors, (14536), 7720 states have internal predecessors, (14536), 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) [2021-11-03 05:39:05,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7721 states to 7721 states and 14536 transitions. [2021-11-03 05:39:05,500 INFO L78 Accepts]: Start accepts. Automaton has 7721 states and 14536 transitions. Word has length 54 [2021-11-03 05:39:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:05,501 INFO L470 AbstractCegarLoop]: Abstraction has 7721 states and 14536 transitions. [2021-11-03 05:39:05,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2021-11-03 05:39:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 7721 states and 14536 transitions. [2021-11-03 05:39:05,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:39:05,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:05,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:05,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:05,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:05,717 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:05,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:05,718 INFO L85 PathProgramCache]: Analyzing trace with hash -537610196, now seen corresponding path program 1 times [2021-11-03 05:39:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:05,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786816780] [2021-11-03 05:39:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:05,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:05,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:05,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:05,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:39:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:06,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:39:06,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:06,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:06,547 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:06,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786816780] [2021-11-03 05:39:06,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786816780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:06,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:06,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:39:06,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470607879] [2021-11-03 05:39:06,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:06,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:06,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:06,548 INFO L87 Difference]: Start difference. First operand 7721 states and 14536 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-03 05:39:07,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:07,299 INFO L93 Difference]: Finished difference Result 23394 states and 44090 transitions. [2021-11-03 05:39:07,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:39:07,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-03 05:39:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:07,339 INFO L225 Difference]: With dead ends: 23394 [2021-11-03 05:39:07,340 INFO L226 Difference]: Without dead ends: 18958 [2021-11-03 05:39:07,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:39:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18958 states. [2021-11-03 05:39:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18958 to 11888. [2021-11-03 05:39:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11888 states, 11883 states have (on average 1.884288479340234) internal successors, (22391), 11887 states have internal predecessors, (22391), 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) [2021-11-03 05:39:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11888 states to 11888 states and 22391 transitions. [2021-11-03 05:39:08,000 INFO L78 Accepts]: Start accepts. Automaton has 11888 states and 22391 transitions. Word has length 54 [2021-11-03 05:39:08,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:08,002 INFO L470 AbstractCegarLoop]: Abstraction has 11888 states and 22391 transitions. [2021-11-03 05:39:08,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 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) [2021-11-03 05:39:08,002 INFO L276 IsEmpty]: Start isEmpty. Operand 11888 states and 22391 transitions. [2021-11-03 05:39:08,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-03 05:39:08,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:08,004 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:08,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:08,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:08,219 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:08,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:08,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1360911902, now seen corresponding path program 1 times [2021-11-03 05:39:08,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:08,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460846424] [2021-11-03 05:39:08,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:08,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:08,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:08,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:08,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:39:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:39:08,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:08,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:09,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:09,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460846424] [2021-11-03 05:39:09,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460846424] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:09,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:09,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:39:09,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171576705] [2021-11-03 05:39:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:09,104 INFO L87 Difference]: Start difference. First operand 11888 states and 22391 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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) [2021-11-03 05:39:11,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:11,713 INFO L93 Difference]: Finished difference Result 64132 states and 121133 transitions. [2021-11-03 05:39:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:39:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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 56 [2021-11-03 05:39:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:11,819 INFO L225 Difference]: With dead ends: 64132 [2021-11-03 05:39:11,819 INFO L226 Difference]: Without dead ends: 55529 [2021-11-03 05:39:11,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:39:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55529 states. [2021-11-03 05:39:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55529 to 19000. [2021-11-03 05:39:12,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19000 states, 18995 states have (on average 1.8869176098973415) internal successors, (35842), 18999 states have internal predecessors, (35842), 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) [2021-11-03 05:39:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19000 states to 19000 states and 35842 transitions. [2021-11-03 05:39:12,947 INFO L78 Accepts]: Start accepts. Automaton has 19000 states and 35842 transitions. Word has length 56 [2021-11-03 05:39:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:12,947 INFO L470 AbstractCegarLoop]: Abstraction has 19000 states and 35842 transitions. [2021-11-03 05:39:12,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 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) [2021-11-03 05:39:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 19000 states and 35842 transitions. [2021-11-03 05:39:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:39:12,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:12,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:12,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:39:13,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:13,165 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2101830717, now seen corresponding path program 1 times [2021-11-03 05:39:13,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:13,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322341450] [2021-11-03 05:39:13,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:13,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:13,167 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:13,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:39:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:39:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:13,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:13,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:13,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322341450] [2021-11-03 05:39:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322341450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:13,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:13,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:39:13,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652793828] [2021-11-03 05:39:13,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:13,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:13,985 INFO L87 Difference]: Start difference. First operand 19000 states and 35842 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-03 05:39:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:15,530 INFO L93 Difference]: Finished difference Result 45986 states and 86413 transitions. [2021-11-03 05:39:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:39:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 63 [2021-11-03 05:39:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:15,582 INFO L225 Difference]: With dead ends: 45986 [2021-11-03 05:39:15,582 INFO L226 Difference]: Without dead ends: 28413 [2021-11-03 05:39:15,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:15,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28413 states. [2021-11-03 05:39:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28413 to 18877. [2021-11-03 05:39:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18877 states, 18872 states have (on average 1.8754239084357778) internal successors, (35393), 18876 states have internal predecessors, (35393), 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) [2021-11-03 05:39:16,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18877 states to 18877 states and 35393 transitions. [2021-11-03 05:39:16,700 INFO L78 Accepts]: Start accepts. Automaton has 18877 states and 35393 transitions. Word has length 63 [2021-11-03 05:39:16,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:16,700 INFO L470 AbstractCegarLoop]: Abstraction has 18877 states and 35393 transitions. [2021-11-03 05:39:16,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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) [2021-11-03 05:39:16,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18877 states and 35393 transitions. [2021-11-03 05:39:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-03 05:39:16,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:16,706 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:16,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:16,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:16,920 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:16,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:16,921 INFO L85 PathProgramCache]: Analyzing trace with hash -943703782, now seen corresponding path program 1 times [2021-11-03 05:39:16,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:16,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082463493] [2021-11-03 05:39:16,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:16,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:16,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:16,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:39:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:17,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:39:17,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:17,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:17,753 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:17,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082463493] [2021-11-03 05:39:17,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082463493] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:17,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:17,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:39:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791827115] [2021-11-03 05:39:17,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:17,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:17,755 INFO L87 Difference]: Start difference. First operand 18877 states and 35393 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) [2021-11-03 05:39:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:18,441 INFO L93 Difference]: Finished difference Result 34613 states and 64835 transitions. [2021-11-03 05:39:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:39:18,442 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 63 [2021-11-03 05:39:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:18,460 INFO L225 Difference]: With dead ends: 34613 [2021-11-03 05:39:18,460 INFO L226 Difference]: Without dead ends: 18892 [2021-11-03 05:39:18,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18892 states. [2021-11-03 05:39:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18892 to 18877. [2021-11-03 05:39:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18877 states, 18872 states have (on average 1.8678995337007207) internal successors, (35251), 18876 states have internal predecessors, (35251), 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) [2021-11-03 05:39:19,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18877 states to 18877 states and 35251 transitions. [2021-11-03 05:39:19,214 INFO L78 Accepts]: Start accepts. Automaton has 18877 states and 35251 transitions. Word has length 63 [2021-11-03 05:39:19,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:19,214 INFO L470 AbstractCegarLoop]: Abstraction has 18877 states and 35251 transitions. [2021-11-03 05:39:19,215 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) [2021-11-03 05:39:19,215 INFO L276 IsEmpty]: Start isEmpty. Operand 18877 states and 35251 transitions. [2021-11-03 05:39:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:39:19,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:19,218 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:19,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:19,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:19,433 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:19,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1812786343, now seen corresponding path program 1 times [2021-11-03 05:39:19,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:19,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397777283] [2021-11-03 05:39:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:19,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:19,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:19,435 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:19,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:39:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:39:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:20,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:20,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:20,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397777283] [2021-11-03 05:39:20,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397777283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:20,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:20,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:39:20,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898488914] [2021-11-03 05:39:20,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:39:20,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:39:20,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:39:20,473 INFO L87 Difference]: Start difference. First operand 18877 states and 35251 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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) [2021-11-03 05:39:23,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:23,060 INFO L93 Difference]: Finished difference Result 54342 states and 101377 transitions. [2021-11-03 05:39:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:39:23,061 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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 64 [2021-11-03 05:39:23,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:23,103 INFO L225 Difference]: With dead ends: 54342 [2021-11-03 05:39:23,103 INFO L226 Difference]: Without dead ends: 38922 [2021-11-03 05:39:23,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:39:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38922 states. [2021-11-03 05:39:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38922 to 15673. [2021-11-03 05:39:23,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15673 states, 15668 states have (on average 1.8586290528465663) internal successors, (29121), 15672 states have internal predecessors, (29121), 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) [2021-11-03 05:39:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15673 states to 15673 states and 29121 transitions. [2021-11-03 05:39:23,698 INFO L78 Accepts]: Start accepts. Automaton has 15673 states and 29121 transitions. Word has length 64 [2021-11-03 05:39:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:23,698 INFO L470 AbstractCegarLoop]: Abstraction has 15673 states and 29121 transitions. [2021-11-03 05:39:23,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 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) [2021-11-03 05:39:23,698 INFO L276 IsEmpty]: Start isEmpty. Operand 15673 states and 29121 transitions. [2021-11-03 05:39:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:39:23,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:23,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:23,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 05:39:23,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:23,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:23,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:23,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1225980329, now seen corresponding path program 1 times [2021-11-03 05:39:23,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:23,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045154617] [2021-11-03 05:39:23,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:23,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:23,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:23,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:23,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:39:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:39:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:24,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:24,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:24,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:24,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045154617] [2021-11-03 05:39:24,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045154617] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:24,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:24,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:39:24,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224379231] [2021-11-03 05:39:24,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:24,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:24,903 INFO L87 Difference]: Start difference. First operand 15673 states and 29121 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-03 05:39:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:26,775 INFO L93 Difference]: Finished difference Result 59834 states and 111233 transitions. [2021-11-03 05:39:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:39:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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 64 [2021-11-03 05:39:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:26,837 INFO L225 Difference]: With dead ends: 59834 [2021-11-03 05:39:26,838 INFO L226 Difference]: Without dead ends: 44334 [2021-11-03 05:39:26,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44334 states. [2021-11-03 05:39:28,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44334 to 44304. [2021-11-03 05:39:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44304 states, 44299 states have (on average 1.8534729903609561) internal successors, (82107), 44303 states have internal predecessors, (82107), 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) [2021-11-03 05:39:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44304 states to 44304 states and 82107 transitions. [2021-11-03 05:39:28,762 INFO L78 Accepts]: Start accepts. Automaton has 44304 states and 82107 transitions. Word has length 64 [2021-11-03 05:39:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:28,762 INFO L470 AbstractCegarLoop]: Abstraction has 44304 states and 82107 transitions. [2021-11-03 05:39:28,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2021-11-03 05:39:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 44304 states and 82107 transitions. [2021-11-03 05:39:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-03 05:39:28,765 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:28,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:28,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:28,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:28,978 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:28,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2119908244, now seen corresponding path program 1 times [2021-11-03 05:39:28,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:28,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404264846] [2021-11-03 05:39:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:28,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:28,980 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:28,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:39:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:39:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:29,981 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:29,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404264846] [2021-11-03 05:39:29,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404264846] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:29,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:29,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:39:29,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828036836] [2021-11-03 05:39:29,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:29,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:29,983 INFO L87 Difference]: Start difference. First operand 44304 states and 82107 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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) [2021-11-03 05:39:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:39:34,673 INFO L93 Difference]: Finished difference Result 172387 states and 319374 transitions. [2021-11-03 05:39:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:39:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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 65 [2021-11-03 05:39:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:39:34,993 INFO L225 Difference]: With dead ends: 172387 [2021-11-03 05:39:34,993 INFO L226 Difference]: Without dead ends: 128257 [2021-11-03 05:39:35,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:35,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128257 states. [2021-11-03 05:39:40,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128257 to 128227. [2021-11-03 05:39:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128227 states, 128222 states have (on average 1.848645318276115) internal successors, (237037), 128226 states have internal predecessors, (237037), 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) [2021-11-03 05:39:40,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128227 states to 128227 states and 237037 transitions. [2021-11-03 05:39:40,957 INFO L78 Accepts]: Start accepts. Automaton has 128227 states and 237037 transitions. Word has length 65 [2021-11-03 05:39:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:39:40,957 INFO L470 AbstractCegarLoop]: Abstraction has 128227 states and 237037 transitions. [2021-11-03 05:39:40,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 3 states have internal predecessors, (122), 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) [2021-11-03 05:39:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 128227 states and 237037 transitions. [2021-11-03 05:39:40,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:39:40,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:39:40,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:39:40,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:39:41,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:39:41,160 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-03 05:39:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:39:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash -680435186, now seen corresponding path program 1 times [2021-11-03 05:39:41,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:39:41,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709555017] [2021-11-03 05:39:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:39:41,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:39:41,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:39:41,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:39:41,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12314c6c-af5f-4674-ac5b-caa9846a23f6/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:39:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:39:41,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:39:41,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:39:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:42,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:39:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:39:42,548 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:39:42,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709555017] [2021-11-03 05:39:42,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709555017] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:39:42,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:39:42,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:39:42,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853539238] [2021-11-03 05:39:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:39:42,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:39:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:39:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:39:42,550 INFO L87 Difference]: Start difference. First operand 128227 states and 237037 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 3 states have internal predecessors, (124), 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)