./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:48,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:48,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:48,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:48,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:48,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:48,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:48,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:48,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:48,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:48,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:48,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:48,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:48,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:48,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:48,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:48,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:48,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:48,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:48,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:48,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:48,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:48,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:48,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:48,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:48,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:48,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:48,161 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:48,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:48,163 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:48,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:48,165 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:48,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:48,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:48,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:48,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:48,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:48,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:48,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:48,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:48,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:48,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:21:48,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:48,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:48,234 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:48,241 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:48,241 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:48,241 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:48,241 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:21:48,242 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:48,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:48,242 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:21:48,243 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:21:48,244 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:48,244 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:21:48,244 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:21:48,244 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:21:48,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:21:48,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:21:48,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:48,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:48,246 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:21:48,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:21:48,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:48,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:48,247 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:21:48,247 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:21:48,248 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:21:48,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:48,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:48,250 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:48,250 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:48,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:48,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:48,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:48,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:48,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:48,252 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:21:48,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:21:48,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:48,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:48,253 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 [2021-11-03 04:21:48,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:48,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:48,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:48,610 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:48,611 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:48,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2021-11-03 04:21:48,692 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/34fb7ccf5/930d7311967c4e6ca3befa4afd4514a3/FLAG9885f60bc [2021-11-03 04:21:49,437 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:49,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2021-11-03 04:21:49,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/34fb7ccf5/930d7311967c4e6ca3befa4afd4514a3/FLAG9885f60bc [2021-11-03 04:21:49,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/34fb7ccf5/930d7311967c4e6ca3befa4afd4514a3 [2021-11-03 04:21:49,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:49,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:49,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:49,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:49,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:49,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:49" (1/1) ... [2021-11-03 04:21:49,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad328b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:49, skipping insertion in model container [2021-11-03 04:21:49,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:49" (1/1) ... [2021-11-03 04:21:49,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:49,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:50,115 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2021-11-03 04:21:50,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:50,301 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:21:50,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a17802a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:50, skipping insertion in model container [2021-11-03 04:21:50,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:50,303 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:21:50,305 INFO L168 Benchmark]: Toolchain (without parser) took 717.06 ms. Allocated memory is still 121.6 MB. Free memory was 81.6 MB in the beginning and 84.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:50,306 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 121.6 MB. Free memory was 92.2 MB in the beginning and 92.1 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:21:50,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 711.13 ms. Allocated memory is still 121.6 MB. Free memory was 81.3 MB in the beginning and 84.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:21:50,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 121.6 MB. Free memory was 92.2 MB in the beginning and 92.1 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 711.13 ms. Allocated memory is still 121.6 MB. Free memory was 81.3 MB in the beginning and 84.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:21:52,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:21:52,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:21:52,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:21:52,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:21:52,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:21:52,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:21:52,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:21:52,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:21:52,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:21:52,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:21:52,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:21:52,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:21:52,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:21:52,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:21:52,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:21:52,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:21:52,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:21:52,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:21:52,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:21:52,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:21:52,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:21:52,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:21:52,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:21:52,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:21:52,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:21:52,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:21:52,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:21:52,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:21:52,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:21:52,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:21:52,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:21:52,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:21:52,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:21:52,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:21:52,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:21:52,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:21:52,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:21:52,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:21:52,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:21:52,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:21:52,827 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:21:52,856 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:21:52,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:21:52,857 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:21:52,857 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:21:52,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:21:52,858 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:21:52,858 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:21:52,858 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:21:52,859 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:21:52,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:21:52,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:21:52,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:21:52,860 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:21:52,861 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:21:52,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:21:52,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:21:52,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:21:52,862 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:21:52,862 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:21:52,862 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:21:52,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:21:52,863 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:21:52,863 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:21:52,863 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:21:52,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:21:52,864 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:21:52,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:21:52,864 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:21:52,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:21:52,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:52,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:21:52,865 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:21:52,865 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:21:52,866 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:21:52,866 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:21:52,866 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:21:52,866 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08dbe1d8baf218c90d79c7aa96b8d857526ff0e474f0acb076b8cd9ca4d11ff2 [2021-11-03 04:21:53,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:21:53,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:21:53,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:21:53,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:21:53,312 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:21:53,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2021-11-03 04:21:53,398 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/d45d5861f/eb6fe992b5f149d8ab6d217e1e55433c/FLAG40a14c16a [2021-11-03 04:21:54,129 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:21:54,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i [2021-11-03 04:21:54,175 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/d45d5861f/eb6fe992b5f149d8ab6d217e1e55433c/FLAG40a14c16a [2021-11-03 04:21:54,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/data/d45d5861f/eb6fe992b5f149d8ab6d217e1e55433c [2021-11-03 04:21:54,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:21:54,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:21:54,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:54,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:21:54,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:21:54,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:54,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@495ec021 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:54, skipping insertion in model container [2021-11-03 04:21:54,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:21:54" (1/1) ... [2021-11-03 04:21:54,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:21:54,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:54,907 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2021-11-03 04:21:55,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,107 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:21:55,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:21:55,150 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2021-11-03 04:21:55,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,335 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:21:55,369 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_a0a28937-dc38-4dbd-9c06-922cead8c90a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-1.i[33021,33034] [2021-11-03 04:21:55,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:21:55,501 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:21:55,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55 WrapperNode [2021-11-03 04:21:55,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:21:55,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:55,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:21:55,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:21:55,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:21:55,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:21:55,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:21:55,690 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:21:55,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,803 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:21:55,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:21:55,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:21:55,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:21:55,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (1/1) ... [2021-11-03 04:21:55,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:21:55,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:21:55,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:21:55,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:21:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:21:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:21:55,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:21:55,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:21:55,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:21:55,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:22:03,119 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:22:03,119 INFO L299 CfgBuilder]: Removed 98 assume(true) statements. [2021-11-03 04:22:03,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:03 BoogieIcfgContainer [2021-11-03 04:22:03,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:22:03,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:22:03,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:22:03,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:22:03,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:21:54" (1/3) ... [2021-11-03 04:22:03,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e4cf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:03, skipping insertion in model container [2021-11-03 04:22:03,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:21:55" (2/3) ... [2021-11-03 04:22:03,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e4cf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:22:03, skipping insertion in model container [2021-11-03 04:22:03,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:22:03" (3/3) ... [2021-11-03 04:22:03,144 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-1.i [2021-11-03 04:22:03,151 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:22:03,152 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 657 error locations. [2021-11-03 04:22:03,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:22:03,236 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:22:03,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 657 error locations. [2021-11-03 04:22:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 1301 states, 643 states have (on average 2.244167962674961) internal successors, (1443), 1300 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:22:03,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:03,313 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:22:03,313 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:03,320 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 04:22:03,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:03,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [670886818] [2021-11-03 04:22:03,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:03,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:03,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:03,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:03,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:22:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:22:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:03,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:03,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:03,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [670886818] [2021-11-03 04:22:03,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [670886818] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:03,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:03,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:22:03,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850654067] [2021-11-03 04:22:03,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:22:03,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:22:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:22:03,700 INFO L87 Difference]: Start difference. First operand has 1301 states, 643 states have (on average 2.244167962674961) internal successors, (1443), 1300 states have internal predecessors, (1443), 0 states have call successors, (0), 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 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:03,856 INFO L93 Difference]: Finished difference Result 1283 states and 1348 transitions. [2021-11-03 04:22:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:22:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 04:22:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:03,907 INFO L225 Difference]: With dead ends: 1283 [2021-11-03 04:22:03,907 INFO L226 Difference]: Without dead ends: 1281 [2021-11-03 04:22:03,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:22:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-11-03 04:22:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1281. [2021-11-03 04:22:04,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 634 states have (on average 2.1230283911671926) internal successors, (1346), 1280 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1346 transitions. [2021-11-03 04:22:04,088 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1346 transitions. Word has length 5 [2021-11-03 04:22:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:04,089 INFO L470 AbstractCegarLoop]: Abstraction has 1281 states and 1346 transitions. [2021-11-03 04:22:04,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1346 transitions. [2021-11-03 04:22:04,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:22:04,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:04,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:22:04,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:04,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:04,298 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 04:22:04,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:04,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632870734] [2021-11-03 04:22:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:04,301 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:04,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:04,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:04,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:22:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:04,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:22:04,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:04,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:04,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:04,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632870734] [2021-11-03 04:22:04,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632870734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:04,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:04,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:22:04,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611874669] [2021-11-03 04:22:04,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:22:04,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:04,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:22:04,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:04,619 INFO L87 Difference]: Start difference. First operand 1281 states and 1346 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:08,035 INFO L93 Difference]: Finished difference Result 1318 states and 1396 transitions. [2021-11-03 04:22:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:22:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-03 04:22:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:08,047 INFO L225 Difference]: With dead ends: 1318 [2021-11-03 04:22:08,047 INFO L226 Difference]: Without dead ends: 1318 [2021-11-03 04:22:08,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-11-03 04:22:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1264. [2021-11-03 04:22:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 710 states have (on average 1.9549295774647888) internal successors, (1388), 1263 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1388 transitions. [2021-11-03 04:22:08,089 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1388 transitions. Word has length 5 [2021-11-03 04:22:08,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:08,089 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1388 transitions. [2021-11-03 04:22:08,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:08,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1388 transitions. [2021-11-03 04:22:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:22:08,090 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:08,090 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:22:08,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:08,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:08,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 04:22:08,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:08,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [554882149] [2021-11-03 04:22:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:08,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:08,327 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:08,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:22:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:08,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:08,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:08,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:08,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [554882149] [2021-11-03 04:22:08,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [554882149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:08,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:08,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:22:08,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440375371] [2021-11-03 04:22:08,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:08,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:08,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:08,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:08,657 INFO L87 Difference]: Start difference. First operand 1264 states and 1388 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:16,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:16,276 INFO L93 Difference]: Finished difference Result 1621 states and 1766 transitions. [2021-11-03 04:22:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:16,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 04:22:16,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:16,287 INFO L225 Difference]: With dead ends: 1621 [2021-11-03 04:22:16,287 INFO L226 Difference]: Without dead ends: 1621 [2021-11-03 04:22:16,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-11-03 04:22:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1420. [2021-11-03 04:22:16,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 876 states have (on average 1.9337899543378996) internal successors, (1694), 1419 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:16,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1694 transitions. [2021-11-03 04:22:16,340 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1694 transitions. Word has length 5 [2021-11-03 04:22:16,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:16,340 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1694 transitions. [2021-11-03 04:22:16,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1694 transitions. [2021-11-03 04:22:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:22:16,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:16,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:22:16,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:16,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:16,559 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 04:22:16,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:16,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [617620393] [2021-11-03 04:22:16,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:16,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:16,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:16,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:16,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:22:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:16,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:22:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:16,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:16,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:16,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:16,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:16,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [617620393] [2021-11-03 04:22:16,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [617620393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:16,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:16,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:16,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317271237] [2021-11-03 04:22:16,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:16,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:16,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:16,780 INFO L87 Difference]: Start difference. First operand 1420 states and 1694 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:16,928 INFO L93 Difference]: Finished difference Result 2783 states and 3320 transitions. [2021-11-03 04:22:16,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:16,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:22:16,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:16,946 INFO L225 Difference]: With dead ends: 2783 [2021-11-03 04:22:16,946 INFO L226 Difference]: Without dead ends: 2783 [2021-11-03 04:22:16,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-11-03 04:22:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2254. [2021-11-03 04:22:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 1710 states have (on average 1.9415204678362572) internal successors, (3320), 2253 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 3320 transitions. [2021-11-03 04:22:17,023 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 3320 transitions. Word has length 6 [2021-11-03 04:22:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 3320 transitions. [2021-11-03 04:22:17,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 3320 transitions. [2021-11-03 04:22:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:22:17,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:17,025 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:17,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:17,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:17,240 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:17,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 04:22:17,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:17,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873305755] [2021-11-03 04:22:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:17,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:17,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:17,244 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:17,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:22:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:22:17,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:17,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:17,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:17,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873305755] [2021-11-03 04:22:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873305755] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:17,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:17,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:22:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802280090] [2021-11-03 04:22:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:17,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:17,528 INFO L87 Difference]: Start difference. First operand 2254 states and 3320 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:17,586 INFO L93 Difference]: Finished difference Result 2194 states and 3234 transitions. [2021-11-03 04:22:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:22:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-03 04:22:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:17,603 INFO L225 Difference]: With dead ends: 2194 [2021-11-03 04:22:17,603 INFO L226 Difference]: Without dead ends: 2194 [2021-11-03 04:22:17,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:17,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-03 04:22:17,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2194. [2021-11-03 04:22:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1674 states have (on average 1.9318996415770608) internal successors, (3234), 2193 states have internal predecessors, (3234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 3234 transitions. [2021-11-03 04:22:17,682 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 3234 transitions. Word has length 11 [2021-11-03 04:22:17,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:17,683 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 3234 transitions. [2021-11-03 04:22:17,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:17,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 3234 transitions. [2021-11-03 04:22:17,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:22:17,684 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:17,684 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:17,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:17,905 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:17,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 04:22:17,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:17,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [665022419] [2021-11-03 04:22:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:17,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:17,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:17,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:17,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:22:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:18,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:18,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:18,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:18,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:18,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [665022419] [2021-11-03 04:22:18,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [665022419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:18,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:18,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:22:18,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483829552] [2021-11-03 04:22:18,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:22:18,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:18,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:22:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:22:18,195 INFO L87 Difference]: Start difference. First operand 2194 states and 3234 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:18,309 INFO L93 Difference]: Finished difference Result 2166 states and 3178 transitions. [2021-11-03 04:22:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-03 04:22:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:18,325 INFO L225 Difference]: With dead ends: 2166 [2021-11-03 04:22:18,325 INFO L226 Difference]: Without dead ends: 2166 [2021-11-03 04:22:18,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2021-11-03 04:22:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2164. [2021-11-03 04:22:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 1658 states have (on average 1.9155609167671894) internal successors, (3176), 2163 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 3176 transitions. [2021-11-03 04:22:18,394 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 3176 transitions. Word has length 13 [2021-11-03 04:22:18,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:18,395 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 3176 transitions. [2021-11-03 04:22:18,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 3176 transitions. [2021-11-03 04:22:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:22:18,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:18,397 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] [2021-11-03 04:22:18,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:18,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:18,612 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:18,612 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 04:22:18,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:18,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615326515] [2021-11-03 04:22:18,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:18,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:18,616 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:18,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:22:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:18,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:18,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:18,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:18,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:19,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:19,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615326515] [2021-11-03 04:22:19,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615326515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:19,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:19,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:22:19,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939938586] [2021-11-03 04:22:19,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:19,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:19,129 INFO L87 Difference]: Start difference. First operand 2164 states and 3176 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:23,248 INFO L93 Difference]: Finished difference Result 2851 states and 4037 transitions. [2021-11-03 04:22:23,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:22:23,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 04:22:23,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:23,270 INFO L225 Difference]: With dead ends: 2851 [2021-11-03 04:22:23,270 INFO L226 Difference]: Without dead ends: 2851 [2021-11-03 04:22:23,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:22:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-11-03 04:22:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2160. [2021-11-03 04:22:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2160 states, 1658 states have (on average 1.910735826296743) internal successors, (3168), 2159 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 3168 transitions. [2021-11-03 04:22:23,341 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 3168 transitions. Word has length 27 [2021-11-03 04:22:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:23,342 INFO L470 AbstractCegarLoop]: Abstraction has 2160 states and 3168 transitions. [2021-11-03 04:22:23,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 3168 transitions. [2021-11-03 04:22:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:22:23,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:23,345 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] [2021-11-03 04:22:23,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:23,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:23,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 04:22:23,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:23,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577045566] [2021-11-03 04:22:23,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:23,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:23,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:23,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:23,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:22:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:22:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:23,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:24,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:24,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:24,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577045566] [2021-11-03 04:22:24,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577045566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:24,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:24,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:22:24,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919610039] [2021-11-03 04:22:24,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:24,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:24,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:22:24,638 INFO L87 Difference]: Start difference. First operand 2160 states and 3168 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 04:22:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:33,618 INFO L93 Difference]: Finished difference Result 2460 states and 3373 transitions. [2021-11-03 04:22:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:22:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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 27 [2021-11-03 04:22:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:33,630 INFO L225 Difference]: With dead ends: 2460 [2021-11-03 04:22:33,630 INFO L226 Difference]: Without dead ends: 2460 [2021-11-03 04:22:33,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:22:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-11-03 04:22:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2156. [2021-11-03 04:22:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 1658 states have (on average 1.9059107358262968) internal successors, (3160), 2155 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 3160 transitions. [2021-11-03 04:22:33,688 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 3160 transitions. Word has length 27 [2021-11-03 04:22:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:33,688 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 3160 transitions. [2021-11-03 04:22:33,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 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) [2021-11-03 04:22:33,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 3160 transitions. [2021-11-03 04:22:33,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 04:22:33,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:33,690 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] [2021-11-03 04:22:33,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:33,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:33,902 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:33,903 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 04:22:33,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:33,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5528393] [2021-11-03 04:22:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:33,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:33,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:22:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:34,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:34,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:34,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:34,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5528393] [2021-11-03 04:22:34,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5528393] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:34,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:34,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:22:34,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655800562] [2021-11-03 04:22:34,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:22:34,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:34,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:22:34,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:22:34,466 INFO L87 Difference]: Start difference. First operand 2156 states and 3160 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:34,549 INFO L93 Difference]: Finished difference Result 2144 states and 3140 transitions. [2021-11-03 04:22:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:22:34,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-03 04:22:34,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:34,562 INFO L225 Difference]: With dead ends: 2144 [2021-11-03 04:22:34,562 INFO L226 Difference]: Without dead ends: 2144 [2021-11-03 04:22:34,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:22:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-11-03 04:22:34,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2144. [2021-11-03 04:22:34,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1646 states have (on average 1.9076549210206561) internal successors, (3140), 2143 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3140 transitions. [2021-11-03 04:22:34,609 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3140 transitions. Word has length 42 [2021-11-03 04:22:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3140 transitions. [2021-11-03 04:22:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3140 transitions. [2021-11-03 04:22:34,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 04:22:34,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:34,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:34,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:34,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:34,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 04:22:34,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:34,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711415166] [2021-11-03 04:22:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:34,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:34,839 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:22:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:22:35,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:35,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:36,139 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:36,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711415166] [2021-11-03 04:22:36,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711415166] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:36,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:36,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:22:36,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614598093] [2021-11-03 04:22:36,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:22:36,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:36,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:22:36,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:36,142 INFO L87 Difference]: Start difference. First operand 2144 states and 3140 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:22:36,258 INFO L93 Difference]: Finished difference Result 1960 states and 2785 transitions. [2021-11-03 04:22:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:22:36,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-03 04:22:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:22:36,272 INFO L225 Difference]: With dead ends: 1960 [2021-11-03 04:22:36,272 INFO L226 Difference]: Without dead ends: 1960 [2021-11-03 04:22:36,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:22:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-11-03 04:22:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1960. [2021-11-03 04:22:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1462 states have (on average 1.9049247606019153) internal successors, (2785), 1959 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:36,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 2785 transitions. [2021-11-03 04:22:36,319 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 2785 transitions. Word has length 50 [2021-11-03 04:22:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:22:36,319 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 2785 transitions. [2021-11-03 04:22:36,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:22:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 2785 transitions. [2021-11-03 04:22:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 04:22:36,325 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:22:36,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:22:36,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:22:36,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:22:36,542 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:22:36,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:22:36,542 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 04:22:36,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:22:36,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082855740] [2021-11-03 04:22:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:22:36,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:22:36,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:22:36,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:22:36,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:22:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:22:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:22:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:22:37,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:37,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:22:37,886 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:22:37,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-03 04:22:37,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:22:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-03 04:22:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:37,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:22:43,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:22:43,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:22:43,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082855740] [2021-11-03 04:22:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082855740] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:22:43,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:22:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:22:43,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717008048] [2021-11-03 04:22:43,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:22:43,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:22:43,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:22:43,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:22:43,566 INFO L87 Difference]: Start difference. First operand 1960 states and 2785 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:04,551 INFO L93 Difference]: Finished difference Result 2626 states and 3583 transitions. [2021-11-03 04:23:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:23:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 04:23:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:04,570 INFO L225 Difference]: With dead ends: 2626 [2021-11-03 04:23:04,571 INFO L226 Difference]: Without dead ends: 2626 [2021-11-03 04:23:04,571 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:23:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-11-03 04:23:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2118. [2021-11-03 04:23:04,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1658 states have (on average 1.8522316043425815) internal successors, (3071), 2117 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 3071 transitions. [2021-11-03 04:23:04,643 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 3071 transitions. Word has length 53 [2021-11-03 04:23:04,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:04,643 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 3071 transitions. [2021-11-03 04:23:04,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 3071 transitions. [2021-11-03 04:23:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:23:04,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:04,649 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] [2021-11-03 04:23:04,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:04,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:04,867 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:23:04,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:04,868 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 04:23:04,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:04,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037331814] [2021-11-03 04:23:04,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:04,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:04,871 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:04,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:23:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:05,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:23:05,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-03 04:23:05,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-03 04:23:05,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:05,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:05,831 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:05,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037331814] [2021-11-03 04:23:05,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037331814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:05,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:05,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:23:05,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637268926] [2021-11-03 04:23:05,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:05,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:05,833 INFO L87 Difference]: Start difference. First operand 2118 states and 3071 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:12,071 INFO L93 Difference]: Finished difference Result 2749 states and 3837 transitions. [2021-11-03 04:23:12,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:23:12,072 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-03 04:23:12,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:12,081 INFO L225 Difference]: With dead ends: 2749 [2021-11-03 04:23:12,081 INFO L226 Difference]: Without dead ends: 2749 [2021-11-03 04:23:12,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:23:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2021-11-03 04:23:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2117. [2021-11-03 04:23:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 1658 states have (on average 1.8510253317249699) internal successors, (3069), 2116 states have internal predecessors, (3069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3069 transitions. [2021-11-03 04:23:12,116 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3069 transitions. Word has length 59 [2021-11-03 04:23:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:12,116 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3069 transitions. [2021-11-03 04:23:12,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3069 transitions. [2021-11-03 04:23:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 04:23:12,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:12,118 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] [2021-11-03 04:23:12,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 04:23:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:12,351 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:23:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:12,351 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 04:23:12,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:12,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486388526] [2021-11-03 04:23:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:12,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:12,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:12,353 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:12,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:23:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:12,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:23:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:23:12,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:23:12,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:23:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:23:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:23:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:13,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:13,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:13,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486388526] [2021-11-03 04:23:13,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486388526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:13,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:13,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:23:13,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269240453] [2021-11-03 04:23:13,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:23:13,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:13,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:23:13,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:23:13,659 INFO L87 Difference]: Start difference. First operand 2117 states and 3069 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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) [2021-11-03 04:23:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:35,251 INFO L93 Difference]: Finished difference Result 2494 states and 3479 transitions. [2021-11-03 04:23:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:23:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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 60 [2021-11-03 04:23:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:35,258 INFO L225 Difference]: With dead ends: 2494 [2021-11-03 04:23:35,259 INFO L226 Difference]: Without dead ends: 2494 [2021-11-03 04:23:35,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:23:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-11-03 04:23:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2116. [2021-11-03 04:23:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 1658 states have (on average 1.8498190591073582) internal successors, (3067), 2115 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 3067 transitions. [2021-11-03 04:23:35,305 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 3067 transitions. Word has length 60 [2021-11-03 04:23:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:35,306 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 3067 transitions. [2021-11-03 04:23:35,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 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) [2021-11-03 04:23:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 3067 transitions. [2021-11-03 04:23:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 04:23:35,307 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:35,307 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:23:35,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:35,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:35,527 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:23:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 04:23:35,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:35,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820054381] [2021-11-03 04:23:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:35,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:35,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:35,529 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:35,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:23:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:23:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:36,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:36,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:36,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820054381] [2021-11-03 04:23:36,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820054381] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:23:36,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:23:36,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:23:36,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795385585] [2021-11-03 04:23:36,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:23:36,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:23:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:23:36,419 INFO L87 Difference]: Start difference. First operand 2116 states and 3067 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 04:23:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:36,715 INFO L93 Difference]: Finished difference Result 2748 states and 3829 transitions. [2021-11-03 04:23:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:23:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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 64 [2021-11-03 04:23:36,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:36,720 INFO L225 Difference]: With dead ends: 2748 [2021-11-03 04:23:36,721 INFO L226 Difference]: Without dead ends: 2748 [2021-11-03 04:23:36,721 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:23:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-11-03 04:23:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2134. [2021-11-03 04:23:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 1676 states have (on average 1.840692124105012) internal successors, (3085), 2133 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 3085 transitions. [2021-11-03 04:23:36,766 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 3085 transitions. Word has length 64 [2021-11-03 04:23:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:36,766 INFO L470 AbstractCegarLoop]: Abstraction has 2134 states and 3085 transitions. [2021-11-03 04:23:36,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 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) [2021-11-03 04:23:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 3085 transitions. [2021-11-03 04:23:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 04:23:36,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:36,767 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:23:36,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:36,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:23:36,982 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:23:36,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 04:23:36,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:36,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217419170] [2021-11-03 04:23:36,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:36,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:36,984 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:23:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:37,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:37,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:37,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:38,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:38,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217419170] [2021-11-03 04:23:38,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217419170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:38,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698841423] [2021-11-03 04:23:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:38,121 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:23:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:23:38,126 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:23:38,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:23:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:38,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:39,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:39,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698841423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:39,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559133898] [2021-11-03 04:23:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:23:39,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:39,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:39,361 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:39,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:23:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:23:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:23:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:40,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:40,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559133898] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:40,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:23:40,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:23:40,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328729316] [2021-11-03 04:23:40,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:23:40,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:23:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:23:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:23:40,432 INFO L87 Difference]: Start difference. First operand 2134 states and 3085 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 04:23:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:23:41,217 INFO L93 Difference]: Finished difference Result 2784 states and 3865 transitions. [2021-11-03 04:23:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:23:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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 66 [2021-11-03 04:23:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:23:41,224 INFO L225 Difference]: With dead ends: 2784 [2021-11-03 04:23:41,224 INFO L226 Difference]: Without dead ends: 2784 [2021-11-03 04:23:41,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:23:41,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-11-03 04:23:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2170. [2021-11-03 04:23:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 1712 states have (on average 1.8230140186915889) internal successors, (3121), 2169 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:23:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 3121 transitions. [2021-11-03 04:23:41,268 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 3121 transitions. Word has length 66 [2021-11-03 04:23:41,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:23:41,269 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 3121 transitions. [2021-11-03 04:23:41,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 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) [2021-11-03 04:23:41,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 3121 transitions. [2021-11-03 04:23:41,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 04:23:41,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:23:41,270 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:23:41,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:41,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-03 04:23:41,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:23:41,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:23:41,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:23:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:23:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 04:23:41,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:23:41,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319904296] [2021-11-03 04:23:41,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:23:41,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:23:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:23:41,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:23:41,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:23:42,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:23:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:42,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:23:42,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:43,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:43,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:23:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319904296] [2021-11-03 04:23:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319904296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:43,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194448838] [2021-11-03 04:23:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:23:43,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:23:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:23:43,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:23:43,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 04:23:45,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:23:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:23:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:23:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:23:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:45,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:23:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:23:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194448838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:23:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261974557] [2021-11-03 04:23:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:23:45,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:23:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:23:45,781 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:23:45,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 04:24:04,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:24:04,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:04,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 04:24:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:04,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261974557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:04,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:24:04,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 04:24:04,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42390800] [2021-11-03 04:24:04,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:24:04,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:24:04,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:24:04,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:24:04,428 INFO L87 Difference]: Start difference. First operand 2170 states and 3121 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:24:08,663 INFO L93 Difference]: Finished difference Result 2856 states and 3937 transitions. [2021-11-03 04:24:08,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:24:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-03 04:24:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:24:08,669 INFO L225 Difference]: With dead ends: 2856 [2021-11-03 04:24:08,669 INFO L226 Difference]: Without dead ends: 2856 [2021-11-03 04:24:08,670 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:24:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2021-11-03 04:24:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2242. [2021-11-03 04:24:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 1784 states have (on average 1.7897982062780269) internal successors, (3193), 2241 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 3193 transitions. [2021-11-03 04:24:08,731 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 3193 transitions. Word has length 70 [2021-11-03 04:24:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:24:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 2242 states and 3193 transitions. [2021-11-03 04:24:08,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:24:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 3193 transitions. [2021-11-03 04:24:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:24:08,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:24:08,734 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:24:08,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:08,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:24:09,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-03 04:24:09,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:09,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 653 more)] === [2021-11-03 04:24:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:24:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 04:24:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:24:09,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6492917] [2021-11-03 04:24:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:24:09,352 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:24:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:24:09,353 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:24:09,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:24:10,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:24:10,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:24:10,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:11,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:13,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:24:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6492917] [2021-11-03 04:24:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6492917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608555124] [2021-11-03 04:24:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:24:13,517 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:24:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:24:13,518 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:24:13,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 04:24:21,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 04:24:21,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:24:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:24:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:24:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:21,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:24:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:24:22,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1608555124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:24:22,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809349016] [2021-11-03 04:24:22,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:24:22,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:24:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:24:22,171 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:24:22,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0a28937-dc38-4dbd-9c06-922cead8c90a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process