./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:29:11,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:29:11,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:29:11,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:29:11,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:29:11,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:29:11,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:29:11,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:29:11,899 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:29:11,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:29:11,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:29:11,908 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:29:11,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:29:11,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:29:11,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:29:11,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:29:11,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:29:11,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:29:11,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:29:11,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:29:11,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:29:11,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:29:11,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:29:11,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:29:11,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:29:11,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:29:11,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:29:11,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:29:11,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:29:11,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:29:11,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:29:11,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:29:11,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:29:11,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:29:11,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:29:11,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:29:11,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:29:11,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:29:11,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:29:11,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:29:11,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:29:11,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:29:12,009 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:29:12,009 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:29:12,011 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:29:12,012 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:29:12,012 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:29:12,012 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:29:12,012 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:29:12,012 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:29:12,013 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:29:12,013 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:29:12,014 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:29:12,014 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:29:12,015 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:29:12,015 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:29:12,015 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:29:12,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:29:12,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:29:12,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:29:12,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:29:12,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:29:12,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:29:12,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:29:12,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:29:12,018 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:29:12,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:29:12,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:29:12,019 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:29:12,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:29:12,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:29:12,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:29:12,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:29:12,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:29:12,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:29:12,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:29:12,021 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:29:12,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:29:12,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:29:12,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:29:12,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:29:12,022 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 [2021-11-07 01:29:12,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:29:12,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:29:12,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:29:12,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:29:12,377 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:29:12,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-07 01:29:12,444 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/9f958c661/6989270a22b7417c8a4f70dad5c415eb/FLAG709bc1912 [2021-11-07 01:29:13,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:29:13,151 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-07 01:29:13,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/9f958c661/6989270a22b7417c8a4f70dad5c415eb/FLAG709bc1912 [2021-11-07 01:29:13,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/9f958c661/6989270a22b7417c8a4f70dad5c415eb [2021-11-07 01:29:13,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:29:13,319 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:29:13,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:13,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:29:13,341 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:29:13,341 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:13" (1/1) ... [2021-11-07 01:29:13,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b7ced00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:13, skipping insertion in model container [2021-11-07 01:29:13,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:13" (1/1) ... [2021-11-07 01:29:13,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:29:13,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:29:13,986 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-07 01:29:14,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:14,082 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:29:14,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e76a0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:14, skipping insertion in model container [2021-11-07 01:29:14,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:14,083 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:29:14,085 INFO L168 Benchmark]: Toolchain (without parser) took 764.68 ms. Allocated memory is still 109.1 MB. Free memory was 64.6 MB in the beginning and 70.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:14,086 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 83.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:29:14,087 INFO L168 Benchmark]: CACSL2BoogieTranslator took 757.35 ms. Allocated memory is still 109.1 MB. Free memory was 64.3 MB in the beginning and 70.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:29:14,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 109.1 MB. Free memory is still 83.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 757.35 ms. Allocated memory is still 109.1 MB. Free memory was 64.3 MB in the beginning and 70.8 MB in the end (delta: -6.5 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2474]: 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:29:16,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:29:16,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:29:16,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:29:16,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:29:16,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:29:16,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:29:16,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:29:16,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:29:16,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:29:16,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:29:16,406 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:29:16,406 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:29:16,408 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:29:16,409 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:29:16,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:29:16,412 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:29:16,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:29:16,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:29:16,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:29:16,420 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:29:16,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:29:16,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:29:16,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:29:16,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:29:16,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:29:16,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:29:16,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:29:16,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:29:16,438 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:29:16,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:29:16,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:29:16,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:29:16,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:29:16,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:29:16,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:29:16,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:29:16,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:29:16,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:29:16,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:29:16,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:29:16,477 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:29:16,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:29:16,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:29:16,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:29:16,527 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:29:16,527 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:29:16,527 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:29:16,528 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:29:16,528 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:29:16,529 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:29:16,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:29:16,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:29:16,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:29:16,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:29:16,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:29:16,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:29:16,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:29:16,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:29:16,534 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:29:16,534 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:29:16,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:29:16,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:29:16,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:29:16,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:29:16,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:29:16,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:29:16,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:29:16,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:29:16,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:29:16,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:29:16,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:29:16,538 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:29:16,538 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:16,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:29:16,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:29:16,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:29:16,540 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e931bf8fe4413228ccd3caf40302412c554842907046b600d394a87eb5d13e97 [2021-11-07 01:29:16,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:29:16,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:29:16,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:29:16,973 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:29:16,974 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:29:16,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-07 01:29:17,046 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/b0a52fa83/ee5ecaae99ae4bd990c319de26c94550/FLAG4b28b1202 [2021-11-07 01:29:17,743 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:29:17,743 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c [2021-11-07 01:29:17,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/b0a52fa83/ee5ecaae99ae4bd990c319de26c94550/FLAG4b28b1202 [2021-11-07 01:29:17,951 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/data/b0a52fa83/ee5ecaae99ae4bd990c319de26c94550 [2021-11-07 01:29:17,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:29:17,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:29:17,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:17,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:29:17,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:29:17,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:17" (1/1) ... [2021-11-07 01:29:17,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542724eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:17, skipping insertion in model container [2021-11-07 01:29:17,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:29:17" (1/1) ... [2021-11-07 01:29:18,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:29:18,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:29:18,659 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-07 01:29:18,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:18,812 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:29:18,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:29:18,934 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-07 01:29:18,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:18,997 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:29:19,077 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_aa5bb44b-7e38-482e-bafe-3f73b7f22836/sv-benchmarks/c/product-lines/email_spec9_product30.cil.c[41508,41521] [2021-11-07 01:29:19,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:29:19,144 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:29:19,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19 WrapperNode [2021-11-07 01:29:19,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:29:19,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:29:19,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:29:19,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:29:19,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,201 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,329 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:29:19,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:29:19,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:29:19,331 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:29:19,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:29:19,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:29:19,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:29:19,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:29:19,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (1/1) ... [2021-11-07 01:29:19,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:29:19,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:19,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:29:19,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:29:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:29:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:29:19,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:29:19,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:29:19,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:29:24,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:29:24,214 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:29:24,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:24 BoogieIcfgContainer [2021-11-07 01:29:24,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:29:24,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:29:24,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:29:24,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:29:24,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:29:17" (1/3) ... [2021-11-07 01:29:24,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43511a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:24, skipping insertion in model container [2021-11-07 01:29:24,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:29:19" (2/3) ... [2021-11-07 01:29:24,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43511a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:29:24, skipping insertion in model container [2021-11-07 01:29:24,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:29:24" (3/3) ... [2021-11-07 01:29:24,228 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product30.cil.c [2021-11-07 01:29:24,234 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:29:24,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:29:24,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:29:24,310 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:29:24,310 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:29:24,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:29:24,391 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:24,392 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] [2021-11-07 01:29:24,392 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:24,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1606635459, now seen corresponding path program 1 times [2021-11-07 01:29:24,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:24,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988433719] [2021-11-07 01:29:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:24,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:24,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:24,414 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:24,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:29:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:24,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:29:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:25,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:25,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:25,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988433719] [2021-11-07 01:29:25,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988433719] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:25,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:25,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:29:25,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819295432] [2021-11-07 01:29:25,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:29:25,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:29:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:29:25,164 INFO L87 Difference]: Start difference. First operand has 505 states, 502 states have (on average 1.7569721115537849) internal successors, (882), 504 states have internal predecessors, (882), 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 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:25,296 INFO L93 Difference]: Finished difference Result 768 states and 1323 transitions. [2021-11-07 01:29:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:29:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 [2021-11-07 01:29:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:25,319 INFO L225 Difference]: With dead ends: 768 [2021-11-07 01:29:25,321 INFO L226 Difference]: Without dead ends: 423 [2021-11-07 01:29:25,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:29:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-07 01:29:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 423. [2021-11-07 01:29:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 421 states have (on average 1.7553444180522566) internal successors, (739), 422 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 739 transitions. [2021-11-07 01:29:25,415 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 739 transitions. Word has length 45 [2021-11-07 01:29:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:25,416 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 739 transitions. [2021-11-07 01:29:25,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 739 transitions. [2021-11-07 01:29:25,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 01:29:25,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:25,443 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] [2021-11-07 01:29:25,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:25,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:25,652 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:25,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1561846480, now seen corresponding path program 1 times [2021-11-07 01:29:25,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:25,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276256650] [2021-11-07 01:29:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:25,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:25,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:25,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:29:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:26,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:29:26,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:26,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:26,328 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:26,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276256650] [2021-11-07 01:29:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276256650] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:26,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:26,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:29:26,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204207611] [2021-11-07 01:29:26,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:26,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:26,332 INFO L87 Difference]: Start difference. First operand 423 states and 739 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:26,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:26,443 INFO L93 Difference]: Finished difference Result 1239 states and 2169 transitions. [2021-11-07 01:29:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:26,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 46 [2021-11-07 01:29:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:26,451 INFO L225 Difference]: With dead ends: 1239 [2021-11-07 01:29:26,451 INFO L226 Difference]: Without dead ends: 831 [2021-11-07 01:29:26,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-11-07 01:29:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 422. [2021-11-07 01:29:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 420 states have (on average 1.7476190476190476) internal successors, (734), 421 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 734 transitions. [2021-11-07 01:29:26,482 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 734 transitions. Word has length 46 [2021-11-07 01:29:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:26,483 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 734 transitions. [2021-11-07 01:29:26,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:26,483 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 734 transitions. [2021-11-07 01:29:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:29:26,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:26,486 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] [2021-11-07 01:29:26,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:26,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1854889078, now seen corresponding path program 1 times [2021-11-07 01:29:26,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:26,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28842922] [2021-11-07 01:29:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:26,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:26,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:26,705 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:26,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:29:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:29:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:27,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:27,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:27,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28842922] [2021-11-07 01:29:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28842922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:27,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:27,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:27,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535403798] [2021-11-07 01:29:27,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:27,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:27,430 INFO L87 Difference]: Start difference. First operand 422 states and 734 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-07 01:29:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:27,662 INFO L93 Difference]: Finished difference Result 1605 states and 2798 transitions. [2021-11-07 01:29:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:29:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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 48 [2021-11-07 01:29:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:27,672 INFO L225 Difference]: With dead ends: 1605 [2021-11-07 01:29:27,672 INFO L226 Difference]: Without dead ends: 1201 [2021-11-07 01:29:27,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-11-07 01:29:27,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 421. [2021-11-07 01:29:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7422434367541766) internal successors, (730), 420 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 730 transitions. [2021-11-07 01:29:27,708 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 730 transitions. Word has length 48 [2021-11-07 01:29:27,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:27,708 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 730 transitions. [2021-11-07 01:29:27,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 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) [2021-11-07 01:29:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 730 transitions. [2021-11-07 01:29:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:29:27,714 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:27,714 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] [2021-11-07 01:29:27,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:27,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:27,931 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:27,932 INFO L85 PathProgramCache]: Analyzing trace with hash -65220393, now seen corresponding path program 1 times [2021-11-07 01:29:27,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:27,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [621766606] [2021-11-07 01:29:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:27,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:27,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:27,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:27,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:29:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:29:28,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:28,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:28,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:28,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [621766606] [2021-11-07 01:29:28,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [621766606] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:28,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:28,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:29:28,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278913253] [2021-11-07 01:29:28,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:28,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:28,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:28,621 INFO L87 Difference]: Start difference. First operand 421 states and 730 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:28,691 INFO L93 Difference]: Finished difference Result 839 states and 1457 transitions. [2021-11-07 01:29:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 49 [2021-11-07 01:29:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:28,695 INFO L225 Difference]: With dead ends: 839 [2021-11-07 01:29:28,696 INFO L226 Difference]: Without dead ends: 426 [2021-11-07 01:29:28,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-11-07 01:29:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 421. [2021-11-07 01:29:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.7350835322195703) internal successors, (727), 420 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 727 transitions. [2021-11-07 01:29:28,728 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 727 transitions. Word has length 49 [2021-11-07 01:29:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:28,729 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 727 transitions. [2021-11-07 01:29:28,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 727 transitions. [2021-11-07 01:29:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 01:29:28,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:28,731 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] [2021-11-07 01:29:28,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,945 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:28,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1735348642, now seen corresponding path program 1 times [2021-11-07 01:29:28,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:28,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572932334] [2021-11-07 01:29:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:28,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:28,948 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:28,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:29:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:29:29,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:29,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:29,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:29,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572932334] [2021-11-07 01:29:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572932334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:29,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:29,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:29,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493219873] [2021-11-07 01:29:29,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:29,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:29,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:29,744 INFO L87 Difference]: Start difference. First operand 421 states and 727 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:29,965 INFO L93 Difference]: Finished difference Result 1592 states and 2774 transitions. [2021-11-07 01:29:29,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:29:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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 [2021-11-07 01:29:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:29,974 INFO L225 Difference]: With dead ends: 1592 [2021-11-07 01:29:29,974 INFO L226 Difference]: Without dead ends: 1197 [2021-11-07 01:29:29,975 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:29:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-07 01:29:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 421. [2021-11-07 01:29:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 419 states have (on average 1.727923627684964) internal successors, (724), 420 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:30,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 724 transitions. [2021-11-07 01:29:30,015 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 724 transitions. Word has length 50 [2021-11-07 01:29:30,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:30,015 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 724 transitions. [2021-11-07 01:29:30,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:30,016 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 724 transitions. [2021-11-07 01:29:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:29:30,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:30,017 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] [2021-11-07 01:29:30,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:30,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:30,231 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:30,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:30,232 INFO L85 PathProgramCache]: Analyzing trace with hash -114337145, now seen corresponding path program 1 times [2021-11-07 01:29:30,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:30,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036302649] [2021-11-07 01:29:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:30,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:30,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:30,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:29:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:30,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:30,962 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:30,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036302649] [2021-11-07 01:29:30,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036302649] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:30,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:30,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:29:30,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533121092] [2021-11-07 01:29:30,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:30,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:30,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:30,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:30,965 INFO L87 Difference]: Start difference. First operand 421 states and 724 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:31,046 INFO L93 Difference]: Finished difference Result 997 states and 1719 transitions. [2021-11-07 01:29:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:29:31,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 [2021-11-07 01:29:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:31,052 INFO L225 Difference]: With dead ends: 997 [2021-11-07 01:29:31,052 INFO L226 Difference]: Without dead ends: 816 [2021-11-07 01:29:31,053 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:31,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-11-07 01:29:31,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 635. [2021-11-07 01:29:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 633 states have (on average 1.7614533965244865) internal successors, (1115), 634 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 1115 transitions. [2021-11-07 01:29:31,105 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 1115 transitions. Word has length 52 [2021-11-07 01:29:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 1115 transitions. [2021-11-07 01:29:31,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 1115 transitions. [2021-11-07 01:29:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:29:31,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:31,109 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] [2021-11-07 01:29:31,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:31,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1774408554, now seen corresponding path program 1 times [2021-11-07 01:29:31,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:31,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1096628284] [2021-11-07 01:29:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:31,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:31,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:31,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:29:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:31,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:31,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:32,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:32,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1096628284] [2021-11-07 01:29:32,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1096628284] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:32,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:32,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:32,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815273174] [2021-11-07 01:29:32,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:32,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:32,075 INFO L87 Difference]: Start difference. First operand 635 states and 1115 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:32,165 INFO L93 Difference]: Finished difference Result 1529 states and 2693 transitions. [2021-11-07 01:29:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 [2021-11-07 01:29:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:32,172 INFO L225 Difference]: With dead ends: 1529 [2021-11-07 01:29:32,173 INFO L226 Difference]: Without dead ends: 978 [2021-11-07 01:29:32,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-07 01:29:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 797. [2021-11-07 01:29:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 795 states have (on average 1.7723270440251573) internal successors, (1409), 796 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1409 transitions. [2021-11-07 01:29:32,245 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1409 transitions. Word has length 64 [2021-11-07 01:29:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:32,247 INFO L470 AbstractCegarLoop]: Abstraction has 797 states and 1409 transitions. [2021-11-07 01:29:32,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1409 transitions. [2021-11-07 01:29:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:29:32,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:32,249 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] [2021-11-07 01:29:32,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:32,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1371796329, now seen corresponding path program 1 times [2021-11-07 01:29:32,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:32,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069712217] [2021-11-07 01:29:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:32,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:32,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:32,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:32,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:29:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:32,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:33,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:33,288 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:33,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069712217] [2021-11-07 01:29:33,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069712217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:33,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:33,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:33,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302850939] [2021-11-07 01:29:33,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:33,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:33,291 INFO L87 Difference]: Start difference. First operand 797 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-07 01:29:33,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:33,397 INFO L93 Difference]: Finished difference Result 2047 states and 3640 transitions. [2021-11-07 01:29:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:33,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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 65 [2021-11-07 01:29:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:33,406 INFO L225 Difference]: With dead ends: 2047 [2021-11-07 01:29:33,407 INFO L226 Difference]: Without dead ends: 1342 [2021-11-07 01:29:33,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-07 01:29:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1161. [2021-11-07 01:29:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1159 states have (on average 1.7886108714408973) internal successors, (2073), 1160 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2073 transitions. [2021-11-07 01:29:33,528 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2073 transitions. Word has length 65 [2021-11-07 01:29:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:33,529 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 2073 transitions. [2021-11-07 01:29:33,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 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) [2021-11-07 01:29:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2073 transitions. [2021-11-07 01:29:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:29:33,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:33,532 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] [2021-11-07 01:29:33,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:33,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:33,746 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:33,747 INFO L85 PathProgramCache]: Analyzing trace with hash 185173544, now seen corresponding path program 1 times [2021-11-07 01:29:33,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:33,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395696205] [2021-11-07 01:29:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:33,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:33,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:33,748 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:33,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:29:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:34,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:34,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:34,564 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:34,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395696205] [2021-11-07 01:29:34,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395696205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:34,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:34,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:34,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764374943] [2021-11-07 01:29:34,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:34,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:34,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:34,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:34,566 INFO L87 Difference]: Start difference. First operand 1161 states and 2073 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:34,726 INFO L93 Difference]: Finished difference Result 3119 states and 5601 transitions. [2021-11-07 01:29:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:34,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-07 01:29:34,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:34,739 INFO L225 Difference]: With dead ends: 3119 [2021-11-07 01:29:34,739 INFO L226 Difference]: Without dead ends: 2058 [2021-11-07 01:29:34,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-11-07 01:29:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1877. [2021-11-07 01:29:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1875 states have (on average 1.8026666666666666) internal successors, (3380), 1876 states have internal predecessors, (3380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 3380 transitions. [2021-11-07 01:29:34,892 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 3380 transitions. Word has length 66 [2021-11-07 01:29:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:34,892 INFO L470 AbstractCegarLoop]: Abstraction has 1877 states and 3380 transitions. [2021-11-07 01:29:34,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 3380 transitions. [2021-11-07 01:29:34,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:29:34,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:34,897 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, 1] [2021-11-07 01:29:34,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:35,111 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1406064808, now seen corresponding path program 1 times [2021-11-07 01:29:35,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:35,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231247193] [2021-11-07 01:29:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:35,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:35,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:35,114 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:35,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:29:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:35,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:35,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:35,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:36,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:36,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231247193] [2021-11-07 01:29:36,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231247193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:36,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:36,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:36,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136781627] [2021-11-07 01:29:36,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:36,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:36,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:36,014 INFO L87 Difference]: Start difference. First operand 1877 states and 3380 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:36,231 INFO L93 Difference]: Finished difference Result 5003 states and 9041 transitions. [2021-11-07 01:29:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:29:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:36,254 INFO L225 Difference]: With dead ends: 5003 [2021-11-07 01:29:36,254 INFO L226 Difference]: Without dead ends: 3260 [2021-11-07 01:29:36,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-11-07 01:29:36,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3079. [2021-11-07 01:29:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3077 states have (on average 1.8098797530061748) internal successors, (5569), 3078 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:36,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 5569 transitions. [2021-11-07 01:29:36,477 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 5569 transitions. Word has length 67 [2021-11-07 01:29:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:36,477 INFO L470 AbstractCegarLoop]: Abstraction has 3079 states and 5569 transitions. [2021-11-07 01:29:36,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:36,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 5569 transitions. [2021-11-07 01:29:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:29:36,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:36,487 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, 1, 1] [2021-11-07 01:29:36,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:36,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:36,702 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2129443351, now seen corresponding path program 1 times [2021-11-07 01:29:36,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:36,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685607548] [2021-11-07 01:29:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:36,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:36,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:36,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:36,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:29:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:37,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:37,592 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:37,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685607548] [2021-11-07 01:29:37,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685607548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:37,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:37,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:37,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198261312] [2021-11-07 01:29:37,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:37,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:37,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:37,595 INFO L87 Difference]: Start difference. First operand 3079 states and 5569 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:37,925 INFO L93 Difference]: Finished difference Result 8325 states and 15091 transitions. [2021-11-07 01:29:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:29:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:37,958 INFO L225 Difference]: With dead ends: 8325 [2021-11-07 01:29:37,958 INFO L226 Difference]: Without dead ends: 5414 [2021-11-07 01:29:37,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-11-07 01:29:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 5233. [2021-11-07 01:29:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5231 states have (on average 1.8126553240298222) internal successors, (9482), 5232 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 9482 transitions. [2021-11-07 01:29:38,435 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 9482 transitions. Word has length 68 [2021-11-07 01:29:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:38,437 INFO L470 AbstractCegarLoop]: Abstraction has 5233 states and 9482 transitions. [2021-11-07 01:29:38,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 9482 transitions. [2021-11-07 01:29:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:29:38,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:38,444 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, 1, 1, 1] [2021-11-07 01:29:38,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:38,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:38,664 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:38,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1634519479, now seen corresponding path program 1 times [2021-11-07 01:29:38,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:38,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2101258875] [2021-11-07 01:29:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:38,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:38,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:38,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:38,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:29:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:39,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:39,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:39,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:39,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2101258875] [2021-11-07 01:29:39,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2101258875] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:39,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:39,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:39,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641083514] [2021-11-07 01:29:39,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:39,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:39,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:39,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:39,578 INFO L87 Difference]: Start difference. First operand 5233 states and 9482 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:40,084 INFO L93 Difference]: Finished difference Result 15245 states and 27672 transitions. [2021-11-07 01:29:40,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:40,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:29:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:40,139 INFO L225 Difference]: With dead ends: 15245 [2021-11-07 01:29:40,139 INFO L226 Difference]: Without dead ends: 10184 [2021-11-07 01:29:40,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-11-07 01:29:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 10003. [2021-11-07 01:29:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10001 states have (on average 1.8137186281371862) internal successors, (18139), 10002 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 18139 transitions. [2021-11-07 01:29:40,972 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 18139 transitions. Word has length 69 [2021-11-07 01:29:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:40,973 INFO L470 AbstractCegarLoop]: Abstraction has 10003 states and 18139 transitions. [2021-11-07 01:29:40,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 18139 transitions. [2021-11-07 01:29:40,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:29:40,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:40,983 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:41,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:41,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:41,199 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:41,199 INFO L85 PathProgramCache]: Analyzing trace with hash 148146151, now seen corresponding path program 1 times [2021-11-07 01:29:41,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:41,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990120387] [2021-11-07 01:29:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:41,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:41,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:41,201 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:41,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:29:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:41,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:41,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:41,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:29:42,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990120387] [2021-11-07 01:29:42,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990120387] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:42,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:42,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:42,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921445237] [2021-11-07 01:29:42,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:42,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:42,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:42,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:42,180 INFO L87 Difference]: Start difference. First operand 10003 states and 18139 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:45,084 INFO L93 Difference]: Finished difference Result 24640 states and 44696 transitions. [2021-11-07 01:29:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:29:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:29:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:45,127 INFO L225 Difference]: With dead ends: 24640 [2021-11-07 01:29:45,127 INFO L226 Difference]: Without dead ends: 14887 [2021-11-07 01:29:45,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:29:45,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14887 states. [2021-11-07 01:29:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14887 to 9970. [2021-11-07 01:29:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9968 states have (on average 1.8064807383627608) internal successors, (18007), 9969 states have internal predecessors, (18007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 18007 transitions. [2021-11-07 01:29:46,009 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 18007 transitions. Word has length 70 [2021-11-07 01:29:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:46,009 INFO L470 AbstractCegarLoop]: Abstraction has 9970 states and 18007 transitions. [2021-11-07 01:29:46,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 18007 transitions. [2021-11-07 01:29:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:29:46,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:46,016 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, 1, 1, 1, 1] [2021-11-07 01:29:46,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:46,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,231 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:46,232 INFO L85 PathProgramCache]: Analyzing trace with hash 792742152, now seen corresponding path program 1 times [2021-11-07 01:29:46,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:46,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68013306] [2021-11-07 01:29:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:46,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:46,233 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:46,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:29:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:46,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:47,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:47,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:47,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68013306] [2021-11-07 01:29:47,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68013306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:47,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:47,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:47,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018324800] [2021-11-07 01:29:47,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:47,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:47,336 INFO L87 Difference]: Start difference. First operand 9970 states and 18007 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:48,068 INFO L93 Difference]: Finished difference Result 29160 states and 52730 transitions. [2021-11-07 01:29:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 01:29:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:48,116 INFO L225 Difference]: With dead ends: 29160 [2021-11-07 01:29:48,116 INFO L226 Difference]: Without dead ends: 19369 [2021-11-07 01:29:48,131 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19369 states. [2021-11-07 01:29:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19369 to 19188. [2021-11-07 01:29:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19188 states, 19186 states have (on average 1.80590013551548) internal successors, (34648), 19187 states have internal predecessors, (34648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:49,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19188 states to 19188 states and 34648 transitions. [2021-11-07 01:29:49,439 INFO L78 Accepts]: Start accepts. Automaton has 19188 states and 34648 transitions. Word has length 70 [2021-11-07 01:29:49,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:49,439 INFO L470 AbstractCegarLoop]: Abstraction has 19188 states and 34648 transitions. [2021-11-07 01:29:49,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:49,440 INFO L276 IsEmpty]: Start isEmpty. Operand 19188 states and 34648 transitions. [2021-11-07 01:29:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:29:49,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:49,448 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, 1, 1, 1, 1, 1] [2021-11-07 01:29:49,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:29:49,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:49,663 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2060322251, now seen corresponding path program 1 times [2021-11-07 01:29:49,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:49,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904347059] [2021-11-07 01:29:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:49,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:49,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:49,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:49,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:29:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:50,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:29:50,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:50,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:29:50,606 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:50,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904347059] [2021-11-07 01:29:50,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904347059] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:50,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:50,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:29:50,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619224593] [2021-11-07 01:29:50,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:29:50,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:29:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:50,608 INFO L87 Difference]: Start difference. First operand 19188 states and 34648 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:52,174 INFO L93 Difference]: Finished difference Result 57000 states and 102967 transitions. [2021-11-07 01:29:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:29:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:29:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:52,266 INFO L225 Difference]: With dead ends: 57000 [2021-11-07 01:29:52,266 INFO L226 Difference]: Without dead ends: 37995 [2021-11-07 01:29:52,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:29:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37995 states. [2021-11-07 01:29:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37995 to 37814. [2021-11-07 01:29:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37814 states, 37812 states have (on average 1.8032635142282873) internal successors, (68185), 37813 states have internal predecessors, (68185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37814 states to 37814 states and 68185 transitions. [2021-11-07 01:29:54,620 INFO L78 Accepts]: Start accepts. Automaton has 37814 states and 68185 transitions. Word has length 71 [2021-11-07 01:29:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:54,621 INFO L470 AbstractCegarLoop]: Abstraction has 37814 states and 68185 transitions. [2021-11-07 01:29:54,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:29:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37814 states and 68185 transitions. [2021-11-07 01:29:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:29:54,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:54,632 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:54,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:54,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:54,848 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2055792609, now seen corresponding path program 1 times [2021-11-07 01:29:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:54,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976912471] [2021-11-07 01:29:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:54,850 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:54,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:54,851 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:54,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:29:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:29:55,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:29:55,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:29:56,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:56,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976912471] [2021-11-07 01:29:56,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976912471] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:56,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:56,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:29:56,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67444751] [2021-11-07 01:29:56,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:29:56,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:56,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:29:56,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:29:56,013 INFO L87 Difference]: Start difference. First operand 37814 states and 68185 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:02,693 INFO L93 Difference]: Finished difference Result 146665 states and 264308 transitions. [2021-11-07 01:30:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:30:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:30:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:02,925 INFO L225 Difference]: With dead ends: 146665 [2021-11-07 01:30:02,925 INFO L226 Difference]: Without dead ends: 109100 [2021-11-07 01:30:02,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:30:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109100 states. [2021-11-07 01:30:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109100 to 37556. [2021-11-07 01:30:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37554 states have (on average 1.7881716994195025) internal successors, (67153), 37555 states have internal predecessors, (67153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 67153 transitions. [2021-11-07 01:30:05,912 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 67153 transitions. Word has length 72 [2021-11-07 01:30:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:05,912 INFO L470 AbstractCegarLoop]: Abstraction has 37556 states and 67153 transitions. [2021-11-07 01:30:05,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 67153 transitions. [2021-11-07 01:30:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:30:05,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:05,920 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:05,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:06,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:06,130 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash 497460995, now seen corresponding path program 1 times [2021-11-07 01:30:06,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:06,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829950794] [2021-11-07 01:30:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:06,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:06,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:06,132 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:06,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:30:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:06,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:07,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:07,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:07,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829950794] [2021-11-07 01:30:07,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829950794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:07,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:30:07,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334950634] [2021-11-07 01:30:07,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:30:07,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:30:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:07,169 INFO L87 Difference]: Start difference. First operand 37556 states and 67153 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:09,023 INFO L93 Difference]: Finished difference Result 75038 states and 134187 transitions. [2021-11-07 01:30:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:30:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:09,089 INFO L225 Difference]: With dead ends: 75038 [2021-11-07 01:30:09,089 INFO L226 Difference]: Without dead ends: 37737 [2021-11-07 01:30:09,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:30:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37737 states. [2021-11-07 01:30:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37737 to 37556. [2021-11-07 01:30:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37556 states, 37554 states have (on average 1.7847632742184587) internal successors, (67025), 37555 states have internal predecessors, (67025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37556 states to 37556 states and 67025 transitions. [2021-11-07 01:30:11,273 INFO L78 Accepts]: Start accepts. Automaton has 37556 states and 67025 transitions. Word has length 72 [2021-11-07 01:30:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:11,274 INFO L470 AbstractCegarLoop]: Abstraction has 37556 states and 67025 transitions. [2021-11-07 01:30:11,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37556 states and 67025 transitions. [2021-11-07 01:30:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:30:11,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:11,282 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:11,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:11,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:11,495 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:11,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1662312950, now seen corresponding path program 1 times [2021-11-07 01:30:11,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:11,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13472743] [2021-11-07 01:30:11,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:11,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:11,497 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:11,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa5bb44b-7e38-482e-bafe-3f73b7f22836/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:30:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:12,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:30:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:12,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:30:12,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:12,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13472743] [2021-11-07 01:30:12,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13472743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:12,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:12,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:30:12,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610850435] [2021-11-07 01:30:12,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:30:12,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:12,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:30:12,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:12,505 INFO L87 Difference]: Start difference. First operand 37556 states and 67025 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:30:15,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:15,751 INFO L93 Difference]: Finished difference Result 104264 states and 185717 transitions. [2021-11-07 01:30:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:30:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 01:30:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:15,858 INFO L225 Difference]: With dead ends: 104264 [2021-11-07 01:30:15,858 INFO L226 Difference]: Without dead ends: 66923 [2021-11-07 01:30:15,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:30:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66923 states. [2021-11-07 01:30:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66923 to 66742. [2021-11-07 01:30:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66742 states, 66740 states have (on average 1.775277195085406) internal successors, (118482), 66741 states have internal predecessors, (118482), 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)