./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8 --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:51,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:51,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:51,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:51,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:51,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:51,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:51,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:51,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:51,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:51,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:51,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:51,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:51,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:51,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:51,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:51,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:51,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:51,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:51,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:51,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:51,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:51,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:51,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:51,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:51,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:51,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:51,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:51,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:51,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:51,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:51,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:51,512 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:51,514 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:51,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:51,516 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:51,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:51,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:51,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:51,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:51,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:51,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:17:51,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:51,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:51,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:51,599 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:51,600 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:51,600 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:51,600 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:17:51,600 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:51,601 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:51,601 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:17:51,602 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:17:51,603 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:51,603 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:17:51,603 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:17:51,603 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:17:51,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:17:51,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:17:51,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:51,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:51,605 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:17:51,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:17:51,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:51,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:51,607 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:17:51,607 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:17:51,607 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:17:51,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:51,609 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:51,610 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:51,610 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:51,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:51,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:51,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:51,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:51,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:51,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:17:51,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:17:51,612 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:51,612 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:51,613 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_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-07 02:17:51,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:52,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:52,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:52,028 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:52,029 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:52,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-07 02:17:52,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/e5e680315/f151d324efd4433a8faf2b2192ddffbd/FLAGf17de8901 [2021-11-07 02:17:52,973 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:52,975 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-07 02:17:52,999 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/e5e680315/f151d324efd4433a8faf2b2192ddffbd/FLAGf17de8901 [2021-11-07 02:17:53,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/e5e680315/f151d324efd4433a8faf2b2192ddffbd [2021-11-07 02:17:53,179 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:53,181 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:53,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:53,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:53,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:53,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:53" (1/1) ... [2021-11-07 02:17:53,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@caebb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:53, skipping insertion in model container [2021-11-07 02:17:53,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:53" (1/1) ... [2021-11-07 02:17:53,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:53,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:54,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:54,047 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:17:54,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@627fdcec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:54, skipping insertion in model container [2021-11-07 02:17:54,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:54,049 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:17:54,054 INFO L168 Benchmark]: Toolchain (without parser) took 869.70 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 65.6 MB in the beginning and 103.6 MB in the end (delta: -37.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:54,056 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:17:54,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 862.18 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 65.6 MB in the beginning and 103.6 MB in the end (delta: -37.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:17:54,062 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 98.6 MB. Free memory is still 53.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 862.18 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 65.6 MB in the beginning and 103.6 MB in the end (delta: -37.9 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: 576]: 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_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8 --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:17:57,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:17:57,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:17:57,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:17:57,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:17:57,149 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:17:57,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:17:57,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:17:57,158 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:17:57,159 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:17:57,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:17:57,163 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:17:57,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:17:57,165 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:17:57,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:17:57,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:17:57,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:17:57,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:17:57,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:17:57,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:17:57,197 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:17:57,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:17:57,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:17:57,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:17:57,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:17:57,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:17:57,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:17:57,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:17:57,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:17:57,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:17:57,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:17:57,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:17:57,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:17:57,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:17:57,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:17:57,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:17:57,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:17:57,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:17:57,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:17:57,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:17:57,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:17:57,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:17:57,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:17:57,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:17:57,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:17:57,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:17:57,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:17:57,309 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:17:57,310 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:17:57,310 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:17:57,310 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:17:57,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:17:57,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:17:57,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:17:57,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:17:57,315 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:17:57,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:17:57,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:17:57,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:17:57,316 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:17:57,316 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:17:57,316 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:17:57,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:17:57,317 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:17:57,317 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:17:57,318 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:17:57,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:17:57,318 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:17:57,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:17:57,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:17:57,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:17:57,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:17:57,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:17:57,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:17:57,321 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:17:57,321 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:17:57,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:17:57,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:17:57,322 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_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2021-11-07 02:17:57,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:17:57,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:17:57,916 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:17:57,918 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:17:57,919 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:17:57,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-07 02:17:58,027 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/da3821c85/8d978e73a19442e1b92cbd2af91434f7/FLAGd8a4606f6 [2021-11-07 02:17:58,917 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:17:58,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2021-11-07 02:17:58,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/da3821c85/8d978e73a19442e1b92cbd2af91434f7/FLAGd8a4606f6 [2021-11-07 02:17:59,147 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/data/da3821c85/8d978e73a19442e1b92cbd2af91434f7 [2021-11-07 02:17:59,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:17:59,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:17:59,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:17:59,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:17:59,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:17:59,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:59" (1/1) ... [2021-11-07 02:17:59,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47043f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:17:59, skipping insertion in model container [2021-11-07 02:17:59,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:17:59" (1/1) ... [2021-11-07 02:17:59,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:17:59,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:17:59,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:17:59,913 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:17:59,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:18:00,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:00,023 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:18:00,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:18:00,214 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:18:00,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00 WrapperNode [2021-11-07 02:18:00,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:18:00,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:00,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:18:00,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:18:00,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:18:00,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:18:00,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:18:00,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:18:00,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,387 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:18:00,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:18:00,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:18:00,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:18:00,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (1/1) ... [2021-11-07 02:18:00,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:18:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:00,535 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:18:00,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:18:00,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:18:00,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:18:00,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:18:00,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:18:00,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:18:00,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:18:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:18:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:18:00,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:18:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:18:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:18:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:18:00,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:18:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:18:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:18:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:18:00,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:18:00,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:18:03,748 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:18:03,749 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-07 02:18:03,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:03 BoogieIcfgContainer [2021-11-07 02:18:03,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:18:03,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:18:03,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:18:03,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:18:03,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:17:59" (1/3) ... [2021-11-07 02:18:03,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abb0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:03, skipping insertion in model container [2021-11-07 02:18:03,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:18:00" (2/3) ... [2021-11-07 02:18:03,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50abb0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:18:03, skipping insertion in model container [2021-11-07 02:18:03,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:18:03" (3/3) ... [2021-11-07 02:18:03,765 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2021-11-07 02:18:03,773 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:18:03,773 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 132 error locations. [2021-11-07 02:18:03,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:18:03,869 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 [2021-11-07 02:18:03,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 132 error locations. [2021-11-07 02:18:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 323 states, 190 states have (on average 1.9) internal successors, (361), 322 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:18:03,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:03,937 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:03,938 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr109REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1804980871, now seen corresponding path program 1 times [2021-11-07 02:18:03,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:03,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063280829] [2021-11-07 02:18:03,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:03,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:03,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:03,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:03,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:18:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:04,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:04,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:04,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:04,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:04,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:04,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063280829] [2021-11-07 02:18:04,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063280829] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:04,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:04,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:04,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164669309] [2021-11-07 02:18:04,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:04,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:04,390 INFO L87 Difference]: Start difference. First operand has 323 states, 190 states have (on average 1.9) internal successors, (361), 322 states have internal predecessors, (361), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:04,992 INFO L93 Difference]: Finished difference Result 1263 states and 1389 transitions. [2021-11-07 02:18:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-07 02:18:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:05,030 INFO L225 Difference]: With dead ends: 1263 [2021-11-07 02:18:05,030 INFO L226 Difference]: Without dead ends: 1255 [2021-11-07 02:18:05,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-07 02:18:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 323. [2021-11-07 02:18:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 191 states have (on average 1.8795811518324608) internal successors, (359), 322 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 359 transitions. [2021-11-07 02:18:05,112 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 359 transitions. Word has length 7 [2021-11-07 02:18:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:05,112 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 359 transitions. [2021-11-07 02:18:05,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:05,113 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 359 transitions. [2021-11-07 02:18:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:18:05,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:05,114 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:05,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:18:05,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:05,333 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr109REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1806827913, now seen corresponding path program 1 times [2021-11-07 02:18:05,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:05,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916572367] [2021-11-07 02:18:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:05,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:05,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:05,336 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:05,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:18:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:05,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:05,539 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 02:18:05,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 02:18:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:05,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:05,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:05,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916572367] [2021-11-07 02:18:05,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916572367] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:05,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:05,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-07 02:18:05,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019852829] [2021-11-07 02:18:05,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:05,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:05,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:05,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:05,834 INFO L87 Difference]: Start difference. First operand 323 states and 359 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:06,568 INFO L93 Difference]: Finished difference Result 444 states and 485 transitions. [2021-11-07 02:18:06,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:06,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 7 [2021-11-07 02:18:06,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:06,574 INFO L225 Difference]: With dead ends: 444 [2021-11-07 02:18:06,574 INFO L226 Difference]: Without dead ends: 444 [2021-11-07 02:18:06,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-11-07 02:18:06,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 325. [2021-11-07 02:18:06,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 193 states have (on average 1.8756476683937824) internal successors, (362), 324 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 362 transitions. [2021-11-07 02:18:06,616 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 362 transitions. Word has length 7 [2021-11-07 02:18:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:06,617 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 362 transitions. [2021-11-07 02:18:06,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 362 transitions. [2021-11-07 02:18:06,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:18:06,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:06,618 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:06,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:06,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:06,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr110REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1806827914, now seen corresponding path program 1 times [2021-11-07 02:18:06,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:06,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4257302] [2021-11-07 02:18:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:06,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:06,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:06,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:06,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:18:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:06,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:07,001 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 [2021-11-07 02:18:07,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:07,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:07,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:07,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4257302] [2021-11-07 02:18:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4257302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:07,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-07 02:18:07,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709536645] [2021-11-07 02:18:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:07,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:07,309 INFO L87 Difference]: Start difference. First operand 325 states and 362 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:08,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:08,746 INFO L93 Difference]: Finished difference Result 427 states and 472 transitions. [2021-11-07 02:18:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:08,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 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 7 [2021-11-07 02:18:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:08,751 INFO L225 Difference]: With dead ends: 427 [2021-11-07 02:18:08,751 INFO L226 Difference]: Without dead ends: 427 [2021-11-07 02:18:08,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:08,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-07 02:18:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 357. [2021-11-07 02:18:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 225 states have (on average 1.8666666666666667) internal successors, (420), 356 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:08,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 420 transitions. [2021-11-07 02:18:08,765 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 420 transitions. Word has length 7 [2021-11-07 02:18:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:08,766 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 420 transitions. [2021-11-07 02:18:08,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 420 transitions. [2021-11-07 02:18:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:08,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:08,767 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:08,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr106ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:08,982 INFO L85 PathProgramCache]: Analyzing trace with hash -592189536, now seen corresponding path program 1 times [2021-11-07 02:18:08,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:08,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135152630] [2021-11-07 02:18:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:08,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:08,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:08,986 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:09,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:18:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:18:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:09,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:09,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135152630] [2021-11-07 02:18:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135152630] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:09,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:09,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:09,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922051810] [2021-11-07 02:18:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:09,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:09,205 INFO L87 Difference]: Start difference. First operand 357 states and 420 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:09,415 INFO L93 Difference]: Finished difference Result 1276 states and 1425 transitions. [2021-11-07 02:18:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:09,425 INFO L225 Difference]: With dead ends: 1276 [2021-11-07 02:18:09,426 INFO L226 Difference]: Without dead ends: 1276 [2021-11-07 02:18:09,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-11-07 02:18:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 359. [2021-11-07 02:18:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 227 states have (on average 1.8590308370044053) internal successors, (422), 358 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 422 transitions. [2021-11-07 02:18:09,444 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 422 transitions. Word has length 9 [2021-11-07 02:18:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:09,444 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 422 transitions. [2021-11-07 02:18:09,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 422 transitions. [2021-11-07 02:18:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:09,446 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:09,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:09,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:09,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:09,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -592189907, now seen corresponding path program 1 times [2021-11-07 02:18:09,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:09,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712454695] [2021-11-07 02:18:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:09,663 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:09,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:09,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:18:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:18:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:09,818 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 [2021-11-07 02:18:09,879 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 02:18:09,879 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 15 treesize of output 20 [2021-11-07 02:18:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:09,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:10,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:10,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712454695] [2021-11-07 02:18:10,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712454695] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:10,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:10,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:18:10,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514450437] [2021-11-07 02:18:10,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:10,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:10,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:10,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:10,049 INFO L87 Difference]: Start difference. First operand 359 states and 422 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:11,436 INFO L93 Difference]: Finished difference Result 607 states and 695 transitions. [2021-11-07 02:18:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:18:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:11,445 INFO L225 Difference]: With dead ends: 607 [2021-11-07 02:18:11,445 INFO L226 Difference]: Without dead ends: 607 [2021-11-07 02:18:11,445 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-11-07 02:18:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 363. [2021-11-07 02:18:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 233 states have (on average 1.8369098712446352) internal successors, (428), 362 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:11,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 428 transitions. [2021-11-07 02:18:11,463 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 428 transitions. Word has length 9 [2021-11-07 02:18:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:11,463 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 428 transitions. [2021-11-07 02:18:11,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:11,464 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 428 transitions. [2021-11-07 02:18:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:11,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:11,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:11,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:11,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:11,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash -592189906, now seen corresponding path program 1 times [2021-11-07 02:18:11,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:11,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878183754] [2021-11-07 02:18:11,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:11,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:11,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:11,685 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:11,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:18:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:18:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:11,913 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 [2021-11-07 02:18:11,924 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 [2021-11-07 02:18:12,072 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:18:12,075 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 [2021-11-07 02:18:12,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:18:12,096 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 22 treesize of output 22 [2021-11-07 02:18:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:12,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:15,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 27 treesize of output 25 [2021-11-07 02:18:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:15,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:15,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878183754] [2021-11-07 02:18:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878183754] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:15,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:15,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:18:15,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561011853] [2021-11-07 02:18:15,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:18:15,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:15,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:18:15,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-11-07 02:18:15,246 INFO L87 Difference]: Start difference. First operand 363 states and 428 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:41,066 INFO L93 Difference]: Finished difference Result 1428 states and 1581 transitions. [2021-11-07 02:18:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:18:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:41,078 INFO L225 Difference]: With dead ends: 1428 [2021-11-07 02:18:41,079 INFO L226 Difference]: Without dead ends: 1428 [2021-11-07 02:18:41,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2021-11-07 02:18:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-07 02:18:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 516. [2021-11-07 02:18:41,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 386 states have (on average 1.839378238341969) internal successors, (710), 515 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 710 transitions. [2021-11-07 02:18:41,113 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 710 transitions. Word has length 9 [2021-11-07 02:18:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:41,114 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 710 transitions. [2021-11-07 02:18:41,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:41,114 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 710 transitions. [2021-11-07 02:18:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:41,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:41,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:41,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:41,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr111REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:41,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:41,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1194850954, now seen corresponding path program 1 times [2021-11-07 02:18:41,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:41,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539467987] [2021-11-07 02:18:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:41,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:41,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:41,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:41,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:18:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:41,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:41,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:41,543 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 02:18:41,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 02:18:41,800 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 32 treesize of output 24 [2021-11-07 02:18:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:41,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:42,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:42,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539467987] [2021-11-07 02:18:42,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539467987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:42,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:42,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 02:18:42,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489638635] [2021-11-07 02:18:42,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:42,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:42,010 INFO L87 Difference]: Start difference. First operand 516 states and 710 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:45,570 INFO L93 Difference]: Finished difference Result 584 states and 780 transitions. [2021-11-07 02:18:45,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:45,577 INFO L225 Difference]: With dead ends: 584 [2021-11-07 02:18:45,578 INFO L226 Difference]: Without dead ends: 584 [2021-11-07 02:18:45,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-07 02:18:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 518. [2021-11-07 02:18:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 388 states have (on average 1.8376288659793814) internal successors, (713), 517 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 713 transitions. [2021-11-07 02:18:45,596 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 713 transitions. Word has length 9 [2021-11-07 02:18:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:45,597 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 713 transitions. [2021-11-07 02:18:45,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:45,598 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 713 transitions. [2021-11-07 02:18:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:45,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:45,599 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:45,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 02:18:45,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:45,813 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr112REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:45,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1194850955, now seen corresponding path program 1 times [2021-11-07 02:18:45,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:45,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46880694] [2021-11-07 02:18:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:45,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:45,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:45,816 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:45,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:18:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:46,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:18:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:46,059 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 [2021-11-07 02:18:46,269 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 34 treesize of output 26 [2021-11-07 02:18:46,274 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 20 treesize of output 12 [2021-11-07 02:18:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:46,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:46,757 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:46,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46880694] [2021-11-07 02:18:46,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46880694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:46,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:46,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 02:18:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120812587] [2021-11-07 02:18:46,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:46,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:46,759 INFO L87 Difference]: Start difference. First operand 518 states and 713 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:50,524 INFO L93 Difference]: Finished difference Result 603 states and 797 transitions. [2021-11-07 02:18:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:18:50,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:50,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:50,528 INFO L225 Difference]: With dead ends: 603 [2021-11-07 02:18:50,528 INFO L226 Difference]: Without dead ends: 603 [2021-11-07 02:18:50,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-11-07 02:18:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 525. [2021-11-07 02:18:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 395 states have (on average 1.8329113924050633) internal successors, (724), 524 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 724 transitions. [2021-11-07 02:18:50,554 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 724 transitions. Word has length 9 [2021-11-07 02:18:50,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:50,555 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 724 transitions. [2021-11-07 02:18:50,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:50,555 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 724 transitions. [2021-11-07 02:18:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 02:18:50,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:50,556 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:50,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-07 02:18:50,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,757 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:50,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:50,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1182817455, now seen corresponding path program 1 times [2021-11-07 02:18:50,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:50,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388247035] [2021-11-07 02:18:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:50,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:50,759 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:50,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:18:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:50,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:51,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:51,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388247035] [2021-11-07 02:18:51,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388247035] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:51,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:51,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:18:51,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647349163] [2021-11-07 02:18:51,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:18:51,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:18:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:18:51,027 INFO L87 Difference]: Start difference. First operand 525 states and 724 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:51,191 INFO L93 Difference]: Finished difference Result 665 states and 728 transitions. [2021-11-07 02:18:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:18:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-07 02:18:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:51,195 INFO L225 Difference]: With dead ends: 665 [2021-11-07 02:18:51,196 INFO L226 Difference]: Without dead ends: 665 [2021-11-07 02:18:51,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:18:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-07 02:18:51,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 325. [2021-11-07 02:18:51,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 200 states have (on average 1.805) internal successors, (361), 324 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 361 transitions. [2021-11-07 02:18:51,207 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 361 transitions. Word has length 9 [2021-11-07 02:18:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:51,208 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 361 transitions. [2021-11-07 02:18:51,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 361 transitions. [2021-11-07 02:18:51,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:18:51,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:51,209 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:51,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:51,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:51,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1176158896, now seen corresponding path program 1 times [2021-11-07 02:18:51,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:51,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266693657] [2021-11-07 02:18:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:51,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:51,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:51,442 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:51,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:18:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:18:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:51,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:51,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:51,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266693657] [2021-11-07 02:18:51,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266693657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:51,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:51,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 02:18:51,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116740788] [2021-11-07 02:18:51,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:18:51,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:51,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:18:51,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:18:51,835 INFO L87 Difference]: Start difference. First operand 325 states and 361 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:52,195 INFO L93 Difference]: Finished difference Result 663 states and 725 transitions. [2021-11-07 02:18:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:18:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 02:18:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:52,199 INFO L225 Difference]: With dead ends: 663 [2021-11-07 02:18:52,199 INFO L226 Difference]: Without dead ends: 663 [2021-11-07 02:18:52,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:52,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-11-07 02:18:52,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 324. [2021-11-07 02:18:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 200 states have (on average 1.795) internal successors, (359), 323 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-11-07 02:18:52,212 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 10 [2021-11-07 02:18:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-11-07 02:18:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-11-07 02:18:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:18:52,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:52,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:52,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:52,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,428 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr131ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash -883735513, now seen corresponding path program 1 times [2021-11-07 02:18:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:52,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106867747] [2021-11-07 02:18:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:52,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:52,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:52,431 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:52,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:18:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:18:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:52,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:52,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:52,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106867747] [2021-11-07 02:18:52,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106867747] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:52,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:52,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:18:52,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495413680] [2021-11-07 02:18:52,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:18:52,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:18:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:52,705 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:53,192 INFO L93 Difference]: Finished difference Result 357 states and 393 transitions. [2021-11-07 02:18:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-11-07 02:18:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:53,194 INFO L225 Difference]: With dead ends: 357 [2021-11-07 02:18:53,195 INFO L226 Difference]: Without dead ends: 356 [2021-11-07 02:18:53,195 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:18:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-07 02:18:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 337. [2021-11-07 02:18:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 213 states have (on average 1.7981220657276995) internal successors, (383), 336 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:53,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 383 transitions. [2021-11-07 02:18:53,203 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 383 transitions. Word has length 12 [2021-11-07 02:18:53,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:53,204 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 383 transitions. [2021-11-07 02:18:53,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 383 transitions. [2021-11-07 02:18:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:18:53,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:53,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:53,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:18:53,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:53,418 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr113REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -883735499, now seen corresponding path program 1 times [2021-11-07 02:18:53,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:53,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283057976] [2021-11-07 02:18:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:53,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:53,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:53,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:53,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:18:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:18:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:53,697 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 15 treesize of output 7 [2021-11-07 02:18:53,703 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 15 treesize of output 7 [2021-11-07 02:18:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:53,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:54,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:54,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:54,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283057976] [2021-11-07 02:18:54,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283057976] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:54,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:54,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:18:54,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850079241] [2021-11-07 02:18:54,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:18:54,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:18:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:18:54,022 INFO L87 Difference]: Start difference. First operand 337 states and 383 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:55,151 INFO L93 Difference]: Finished difference Result 338 states and 371 transitions. [2021-11-07 02:18:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:18:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2021-11-07 02:18:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:55,154 INFO L225 Difference]: With dead ends: 338 [2021-11-07 02:18:55,155 INFO L226 Difference]: Without dead ends: 330 [2021-11-07 02:18:55,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:18:55,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-07 02:18:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 324. [2021-11-07 02:18:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 200 states have (on average 1.81) internal successors, (362), 323 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 362 transitions. [2021-11-07 02:18:55,164 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 362 transitions. Word has length 12 [2021-11-07 02:18:55,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:18:55,165 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 362 transitions. [2021-11-07 02:18:55,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:55,165 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 362 transitions. [2021-11-07 02:18:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:18:55,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:18:55,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:18:55,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:18:55,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,387 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr109REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:18:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:18:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash -605977373, now seen corresponding path program 1 times [2021-11-07 02:18:55,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:18:55,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908468397] [2021-11-07 02:18:55,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:18:55,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:18:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:18:55,391 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:18:55,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:18:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:18:55,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:18:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:18:55,632 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 02:18:55,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 02:18:55,751 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-07 02:18:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 47 [2021-11-07 02:18:56,719 INFO L354 Elim1Store]: treesize reduction 31, result has 50.8 percent of original size [2021-11-07 02:18:56,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 89 [2021-11-07 02:18:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:57,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:18:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:18:57,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:57,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908468397] [2021-11-07 02:18:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908468397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:18:57,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:18:57,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-11-07 02:18:57,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82618912] [2021-11-07 02:18:57,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:18:57,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:18:57,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:18:57,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:18:57,773 INFO L87 Difference]: Start difference. First operand 324 states and 362 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:31,888 INFO L93 Difference]: Finished difference Result 592 states and 648 transitions. [2021-11-07 02:20:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:20:31,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-07 02:20:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:31,892 INFO L225 Difference]: With dead ends: 592 [2021-11-07 02:20:31,892 INFO L226 Difference]: Without dead ends: 592 [2021-11-07 02:20:31,892 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:20:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-11-07 02:20:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 324. [2021-11-07 02:20:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 200 states have (on average 1.805) internal successors, (361), 323 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 361 transitions. [2021-11-07 02:20:31,901 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 361 transitions. Word has length 13 [2021-11-07 02:20:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:31,902 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 361 transitions. [2021-11-07 02:20:31,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 361 transitions. [2021-11-07 02:20:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:20:31,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:31,903 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:31,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:32,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:32,104 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr110REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:32,104 INFO L85 PathProgramCache]: Analyzing trace with hash -605977372, now seen corresponding path program 1 times [2021-11-07 02:20:32,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:32,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629817868] [2021-11-07 02:20:32,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:32,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:32,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:32,106 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:32,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:20:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:32,301 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-07 02:20:32,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-07 02:20:32,319 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 [2021-11-07 02:20:32,401 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:20:32,401 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 34 treesize of output 36 [2021-11-07 02:20:32,420 INFO L354 Elim1Store]: treesize reduction 9, result has 64.0 percent of original size [2021-11-07 02:20:32,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 02:20:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:32,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:34,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:34,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629817868] [2021-11-07 02:20:34,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629817868] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:34,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:34,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-07 02:20:34,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387827267] [2021-11-07 02:20:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:20:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:20:34,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 02:20:34,940 INFO L87 Difference]: Start difference. First operand 324 states and 361 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:36,228 INFO L93 Difference]: Finished difference Result 397 states and 437 transitions. [2021-11-07 02:20:36,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:36,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-11-07 02:20:36,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:36,231 INFO L225 Difference]: With dead ends: 397 [2021-11-07 02:20:36,231 INFO L226 Difference]: Without dead ends: 397 [2021-11-07 02:20:36,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=19, Invalid=22, Unknown=1, NotChecked=0, Total=42 [2021-11-07 02:20:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-07 02:20:36,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 323. [2021-11-07 02:20:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 200 states have (on average 1.795) internal successors, (359), 322 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 359 transitions. [2021-11-07 02:20:36,238 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 359 transitions. Word has length 13 [2021-11-07 02:20:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:36,238 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 359 transitions. [2021-11-07 02:20:36,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 359 transitions. [2021-11-07 02:20:36,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:20:36,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:36,240 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:36,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:36,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:36,450 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash -493393868, now seen corresponding path program 1 times [2021-11-07 02:20:36,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:36,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906267448] [2021-11-07 02:20:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:36,451 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:36,452 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:36,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:20:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:36,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:36,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:36,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906267448] [2021-11-07 02:20:36,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906267448] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:36,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:36,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:36,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485164988] [2021-11-07 02:20:36,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:36,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:36,772 INFO L87 Difference]: Start difference. First operand 323 states and 359 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:36,901 INFO L93 Difference]: Finished difference Result 1204 states and 1322 transitions. [2021-11-07 02:20:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-07 02:20:36,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:36,908 INFO L225 Difference]: With dead ends: 1204 [2021-11-07 02:20:36,908 INFO L226 Difference]: Without dead ends: 1204 [2021-11-07 02:20:36,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-11-07 02:20:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 325. [2021-11-07 02:20:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 202 states have (on average 1.7871287128712872) internal successors, (361), 324 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 361 transitions. [2021-11-07 02:20:36,922 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 361 transitions. Word has length 14 [2021-11-07 02:20:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:36,922 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 361 transitions. [2021-11-07 02:20:36,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 361 transitions. [2021-11-07 02:20:36,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:20:36,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:36,923 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:36,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:20:37,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:37,135 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:37,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -493394216, now seen corresponding path program 1 times [2021-11-07 02:20:37,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:37,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2021331300] [2021-11-07 02:20:37,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:37,136 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:37,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:37,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:20:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:20:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:37,417 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 [2021-11-07 02:20:37,469 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 02:20:37,469 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 18 treesize of output 23 [2021-11-07 02:20:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:37,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:37,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:37,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2021331300] [2021-11-07 02:20:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2021331300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:37,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:37,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901739408] [2021-11-07 02:20:37,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:37,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:37,577 INFO L87 Difference]: Start difference. First operand 325 states and 361 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:38,312 INFO L93 Difference]: Finished difference Result 555 states and 614 transitions. [2021-11-07 02:20:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-07 02:20:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:38,316 INFO L225 Difference]: With dead ends: 555 [2021-11-07 02:20:38,317 INFO L226 Difference]: Without dead ends: 555 [2021-11-07 02:20:38,317 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:38,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-07 02:20:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 336. [2021-11-07 02:20:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 213 states have (on average 1.7699530516431925) internal successors, (377), 335 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 377 transitions. [2021-11-07 02:20:38,325 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 377 transitions. Word has length 14 [2021-11-07 02:20:38,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:38,326 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 377 transitions. [2021-11-07 02:20:38,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 377 transitions. [2021-11-07 02:20:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:20:38,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:38,327 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:38,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:20:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:38,539 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash -493394215, now seen corresponding path program 1 times [2021-11-07 02:20:38,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:38,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566934562] [2021-11-07 02:20:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:38,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:38,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:38,541 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:38,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:20:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:38,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:20:38,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:38,808 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 [2021-11-07 02:20:38,818 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 [2021-11-07 02:20:38,959 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:20:38,960 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 27 treesize of output 29 [2021-11-07 02:20:38,972 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:20:38,972 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 21 treesize of output 21 [2021-11-07 02:20:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:39,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 24 [2021-11-07 02:20:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:39,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:39,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566934562] [2021-11-07 02:20:39,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566934562] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:39,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:39,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:20:39,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543395333] [2021-11-07 02:20:39,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:20:39,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:39,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:20:39,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:20:39,589 INFO L87 Difference]: Start difference. First operand 336 states and 377 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:56,482 INFO L93 Difference]: Finished difference Result 1556 states and 1684 transitions. [2021-11-07 02:20:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 02:20:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2021-11-07 02:20:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:56,488 INFO L225 Difference]: With dead ends: 1556 [2021-11-07 02:20:56,489 INFO L226 Difference]: Without dead ends: 1556 [2021-11-07 02:20:56,489 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:20:56,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-11-07 02:20:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 481. [2021-11-07 02:20:56,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 358 states have (on average 1.7988826815642458) internal successors, (644), 480 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 644 transitions. [2021-11-07 02:20:56,507 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 644 transitions. Word has length 14 [2021-11-07 02:20:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:56,508 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 644 transitions. [2021-11-07 02:20:56,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:56,508 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 644 transitions. [2021-11-07 02:20:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:20:56,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:56,509 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:56,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:56,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:56,722 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:56,722 INFO L85 PathProgramCache]: Analyzing trace with hash 186664154, now seen corresponding path program 1 times [2021-11-07 02:20:56,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:56,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769046307] [2021-11-07 02:20:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:56,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:56,724 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:56,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:20:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:20:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:57,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:57,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:57,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:57,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769046307] [2021-11-07 02:20:57,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769046307] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:57,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:57,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:20:57,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841943318] [2021-11-07 02:20:57,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:57,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:57,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:20:57,087 INFO L87 Difference]: Start difference. First operand 481 states and 644 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:57,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:57,194 INFO L93 Difference]: Finished difference Result 620 states and 678 transitions. [2021-11-07 02:20:57,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:20:57,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-07 02:20:57,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:57,197 INFO L225 Difference]: With dead ends: 620 [2021-11-07 02:20:57,197 INFO L226 Difference]: Without dead ends: 620 [2021-11-07 02:20:57,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:57,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-07 02:20:57,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 325. [2021-11-07 02:20:57,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 205 states have (on average 1.7609756097560976) internal successors, (361), 324 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 361 transitions. [2021-11-07 02:20:57,205 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 361 transitions. Word has length 14 [2021-11-07 02:20:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:57,205 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 361 transitions. [2021-11-07 02:20:57,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 361 transitions. [2021-11-07 02:20:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:57,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:57,206 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:57,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-07 02:20:57,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:20:57,421 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr104ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:57,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1886506805, now seen corresponding path program 1 times [2021-11-07 02:20:57,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:57,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102026054] [2021-11-07 02:20:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:57,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:57,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:57,422 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:57,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:20:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:57,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:57,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102026054] [2021-11-07 02:20:57,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 02:20:57,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1753902948] [2021-11-07 02:20:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:57,721 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:57,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:20:57,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:20:57,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:20:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:58,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:20:58,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:58,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:58,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1753902948] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:58,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:58,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:58,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926142574] [2021-11-07 02:20:58,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:20:58,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:20:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:20:58,165 INFO L87 Difference]: Start difference. First operand 325 states and 361 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:20:58,347 INFO L93 Difference]: Finished difference Result 328 states and 360 transitions. [2021-11-07 02:20:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:20:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-07 02:20:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:20:58,349 INFO L225 Difference]: With dead ends: 328 [2021-11-07 02:20:58,349 INFO L226 Difference]: Without dead ends: 328 [2021-11-07 02:20:58,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:20:58,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-07 02:20:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2021-11-07 02:20:58,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 205 states have (on average 1.751219512195122) internal successors, (359), 323 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-11-07 02:20:58,356 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 15 [2021-11-07 02:20:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:20:58,356 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-11-07 02:20:58,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:20:58,357 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-11-07 02:20:58,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:20:58,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:20:58,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:20:58,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:58,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:20:58,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:20:58,770 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr111REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:20:58,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:20:58,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1771310948, now seen corresponding path program 1 times [2021-11-07 02:20:58,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:20:58,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233521964] [2021-11-07 02:20:58,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:20:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:20:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:20:58,772 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:20:58,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:20:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:20:58,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:20:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:20:59,061 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 15 [2021-11-07 02:20:59,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:59,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:20:59,124 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-07 02:20:59,124 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 23 treesize of output 22 [2021-11-07 02:20:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:20:59,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:20:59,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233521964] [2021-11-07 02:20:59,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233521964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:20:59,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:20:59,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:20:59,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862813094] [2021-11-07 02:20:59,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:20:59,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:20:59,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:20:59,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:20:59,181 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:00,800 INFO L93 Difference]: Finished difference Result 356 states and 389 transitions. [2021-11-07 02:21:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-11-07 02:21:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:00,802 INFO L225 Difference]: With dead ends: 356 [2021-11-07 02:21:00,802 INFO L226 Difference]: Without dead ends: 356 [2021-11-07 02:21:00,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:21:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-07 02:21:00,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 324. [2021-11-07 02:21:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 205 states have (on average 1.7463414634146341) internal successors, (358), 323 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:00,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 358 transitions. [2021-11-07 02:21:00,808 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 358 transitions. Word has length 15 [2021-11-07 02:21:00,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:00,809 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 358 transitions. [2021-11-07 02:21:00,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:00,809 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 358 transitions. [2021-11-07 02:21:00,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:21:00,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:00,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:00,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 02:21:01,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:01,021 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr112REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:21:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:01,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1771310949, now seen corresponding path program 1 times [2021-11-07 02:21:01,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:01,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1871645041] [2021-11-07 02:21:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:01,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:01,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:01,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:01,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:21:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:01,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:21:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:01,439 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 34 treesize of output 26 [2021-11-07 02:21:01,444 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 20 treesize of output 12 [2021-11-07 02:21:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:01,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:01,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:21:01,629 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 38 treesize of output 42 [2021-11-07 02:21:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:01,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:01,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1871645041] [2021-11-07 02:21:01,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1871645041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:01,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:01,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-07 02:21:01,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855132673] [2021-11-07 02:21:01,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:21:01,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:21:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:21:01,993 INFO L87 Difference]: Start difference. First operand 324 states and 358 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:04,451 INFO L93 Difference]: Finished difference Result 361 states and 394 transitions. [2021-11-07 02:21:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:21:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-11-07 02:21:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:04,453 INFO L225 Difference]: With dead ends: 361 [2021-11-07 02:21:04,453 INFO L226 Difference]: Without dead ends: 361 [2021-11-07 02:21:04,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:21:04,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-11-07 02:21:04,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 324. [2021-11-07 02:21:04,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 205 states have (on average 1.7414634146341463) internal successors, (357), 323 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 357 transitions. [2021-11-07 02:21:04,458 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 357 transitions. Word has length 15 [2021-11-07 02:21:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:04,459 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 357 transitions. [2021-11-07 02:21:04,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:04,459 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 357 transitions. [2021-11-07 02:21:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 02:21:04,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:04,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:04,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 02:21:04,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:04,674 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr131ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:21:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:04,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1156696333, now seen corresponding path program 1 times [2021-11-07 02:21:04,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:04,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555021745] [2021-11-07 02:21:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:04,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:04,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:04,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:04,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:21:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:21:04,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:05,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:09,448 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:09,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555021745] [2021-11-07 02:21:09,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555021745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:09,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:09,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:21:09,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719455754] [2021-11-07 02:21:09,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:21:09,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:21:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-11-07 02:21:09,450 INFO L87 Difference]: Start difference. First operand 324 states and 357 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:11,088 INFO L93 Difference]: Finished difference Result 325 states and 357 transitions. [2021-11-07 02:21:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:21:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 18 [2021-11-07 02:21:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:11,091 INFO L225 Difference]: With dead ends: 325 [2021-11-07 02:21:11,091 INFO L226 Difference]: Without dead ends: 313 [2021-11-07 02:21:11,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2021-11-07 02:21:11,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-07 02:21:11,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-11-07 02:21:11,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 194 states have (on average 1.7783505154639174) internal successors, (345), 312 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 345 transitions. [2021-11-07 02:21:11,098 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 345 transitions. Word has length 18 [2021-11-07 02:21:11,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:11,098 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 345 transitions. [2021-11-07 02:21:11,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 345 transitions. [2021-11-07 02:21:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:21:11,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:11,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:11,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-07 02:21:11,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:11,315 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr100ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:21:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:11,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1550215582, now seen corresponding path program 1 times [2021-11-07 02:21:11,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:11,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232055487] [2021-11-07 02:21:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:11,316 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:11,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:11,316 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:11,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:21:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:11,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:11,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:11,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:11,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:11,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232055487] [2021-11-07 02:21:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232055487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:11,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:11,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:21:11,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184604646] [2021-11-07 02:21:11,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:11,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:11,662 INFO L87 Difference]: Start difference. First operand 313 states and 345 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:11,795 INFO L93 Difference]: Finished difference Result 1173 states and 1283 transitions. [2021-11-07 02:21:11,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:11,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-07 02:21:11,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:11,800 INFO L225 Difference]: With dead ends: 1173 [2021-11-07 02:21:11,801 INFO L226 Difference]: Without dead ends: 1173 [2021-11-07 02:21:11,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-11-07 02:21:11,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 315. [2021-11-07 02:21:11,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 196 states have (on average 1.7704081632653061) internal successors, (347), 314 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 347 transitions. [2021-11-07 02:21:11,808 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 347 transitions. Word has length 19 [2021-11-07 02:21:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:11,808 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 347 transitions. [2021-11-07 02:21:11,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 347 transitions. [2021-11-07 02:21:11,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:21:11,809 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:11,809 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:11,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:12,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,021 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr100ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:21:12,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1550156000, now seen corresponding path program 1 times [2021-11-07 02:21:12,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:12,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638629731] [2021-11-07 02:21:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:12,023 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:12,023 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:12,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:21:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:12,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:12,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:12,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:12,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:12,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638629731] [2021-11-07 02:21:12,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638629731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:12,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:12,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:21:12,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29138107] [2021-11-07 02:21:12,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:12,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:12,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:12,403 INFO L87 Difference]: Start difference. First operand 315 states and 347 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:12,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:21:12,468 INFO L93 Difference]: Finished difference Result 314 states and 346 transitions. [2021-11-07 02:21:12,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:21:12,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-11-07 02:21:12,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:21:12,470 INFO L225 Difference]: With dead ends: 314 [2021-11-07 02:21:12,470 INFO L226 Difference]: Without dead ends: 314 [2021-11-07 02:21:12,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:21:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-07 02:21:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-11-07 02:21:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 196 states have (on average 1.7653061224489797) internal successors, (346), 313 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:12,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 346 transitions. [2021-11-07 02:21:12,476 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 346 transitions. Word has length 19 [2021-11-07 02:21:12,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:21:12,477 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 346 transitions. [2021-11-07 02:21:12,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:21:12,477 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 346 transitions. [2021-11-07 02:21:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 02:21:12,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:12,477 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:12,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:21:12,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,678 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:21:12,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:12,678 INFO L85 PathProgramCache]: Analyzing trace with hash 952298202, now seen corresponding path program 1 times [2021-11-07 02:21:12,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:12,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835479687] [2021-11-07 02:21:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:12,679 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:12,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:12,680 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:12,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 02:21:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:12,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:21:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:12,971 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 [2021-11-07 02:21:13,027 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:21:13,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 02:21:13,315 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-07 02:21:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-11-07 02:21:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:13,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:17,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:17,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835479687] [2021-11-07 02:21:17,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835479687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:17,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:17,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-07 02:21:17,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244289140] [2021-11-07 02:21:17,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:21:17,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:17,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:21:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2021-11-07 02:21:17,582 INFO L87 Difference]: Start difference. First operand 314 states and 346 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:49,816 INFO L93 Difference]: Finished difference Result 520 states and 572 transitions. [2021-11-07 02:22:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:22:49,817 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 02:22:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:49,819 INFO L225 Difference]: With dead ends: 520 [2021-11-07 02:22:49,820 INFO L226 Difference]: Without dead ends: 520 [2021-11-07 02:22:49,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=62, Invalid=117, Unknown=3, NotChecked=0, Total=182 [2021-11-07 02:22:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-07 02:22:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 317. [2021-11-07 02:22:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 199 states have (on average 1.7537688442211055) internal successors, (349), 316 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 349 transitions. [2021-11-07 02:22:49,826 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 349 transitions. Word has length 19 [2021-11-07 02:22:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:49,827 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 349 transitions. [2021-11-07 02:22:49,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 349 transitions. [2021-11-07 02:22:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:22:49,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:49,828 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] [2021-11-07 02:22:49,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:50,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:50,039 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr101ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:22:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:50,039 INFO L85 PathProgramCache]: Analyzing trace with hash -810195264, now seen corresponding path program 1 times [2021-11-07 02:22:50,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:50,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767254740] [2021-11-07 02:22:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:50,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:50,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:50,041 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:50,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 02:22:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:22:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:50,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:50,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767254740] [2021-11-07 02:22:50,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 02:22:50,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209456251] [2021-11-07 02:22:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:50,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:50,530 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:50,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 02:22:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:51,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209456251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:51,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:51,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:51,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507701940] [2021-11-07 02:22:51,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:51,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:22:51,156 INFO L87 Difference]: Start difference. First operand 317 states and 349 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:51,595 INFO L93 Difference]: Finished difference Result 887 states and 973 transitions. [2021-11-07 02:22:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-07 02:22:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:51,601 INFO L225 Difference]: With dead ends: 887 [2021-11-07 02:22:51,601 INFO L226 Difference]: Without dead ends: 887 [2021-11-07 02:22:51,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:22:51,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-11-07 02:22:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 463. [2021-11-07 02:22:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 345 states have (on average 1.7855072463768116) internal successors, (616), 462 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 616 transitions. [2021-11-07 02:22:51,612 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 616 transitions. Word has length 20 [2021-11-07 02:22:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:51,613 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 616 transitions. [2021-11-07 02:22:51,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 616 transitions. [2021-11-07 02:22:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:22:51,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:51,614 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] [2021-11-07 02:22:51,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:51,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:52,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:52,025 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr101ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:22:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:52,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1203222274, now seen corresponding path program 1 times [2021-11-07 02:22:52,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:52,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065039957] [2021-11-07 02:22:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:52,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:52,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:52,026 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 02:22:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:52,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:52,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:52,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:52,580 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:52,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065039957] [2021-11-07 02:22:52,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065039957] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:52,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:52,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:22:52,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445107495] [2021-11-07 02:22:52,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:52,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:52,582 INFO L87 Difference]: Start difference. First operand 463 states and 616 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:52,724 INFO L93 Difference]: Finished difference Result 647 states and 703 transitions. [2021-11-07 02:22:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-11-07 02:22:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:52,729 INFO L225 Difference]: With dead ends: 647 [2021-11-07 02:22:52,729 INFO L226 Difference]: Without dead ends: 647 [2021-11-07 02:22:52,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:22:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-11-07 02:22:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 316. [2021-11-07 02:22:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 199 states have (on average 1.743718592964824) internal successors, (347), 315 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 347 transitions. [2021-11-07 02:22:52,738 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 347 transitions. Word has length 20 [2021-11-07 02:22:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:52,739 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 347 transitions. [2021-11-07 02:22:52,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 347 transitions. [2021-11-07 02:22:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:22:52,740 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:52,740 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] [2021-11-07 02:22:52,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:52,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:52,954 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr102ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:22:52,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash 653751074, now seen corresponding path program 1 times [2021-11-07 02:22:52,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:52,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034283867] [2021-11-07 02:22:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:52,956 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:52,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:52,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:52,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 02:22:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:53,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:22:53,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:53,363 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 [2021-11-07 02:22:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:53,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:53,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:53,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034283867] [2021-11-07 02:22:53,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034283867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:53,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:22:53,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:22:53,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423694543] [2021-11-07 02:22:53,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:53,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:53,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:53,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:53,470 INFO L87 Difference]: Start difference. First operand 316 states and 347 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:54,243 INFO L93 Difference]: Finished difference Result 515 states and 566 transitions. [2021-11-07 02:22:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:54,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-11-07 02:22:54,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:54,247 INFO L225 Difference]: With dead ends: 515 [2021-11-07 02:22:54,247 INFO L226 Difference]: Without dead ends: 515 [2021-11-07 02:22:54,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:22:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-11-07 02:22:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 319. [2021-11-07 02:22:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 202 states have (on average 1.7326732673267327) internal successors, (350), 318 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 350 transitions. [2021-11-07 02:22:54,253 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 350 transitions. Word has length 21 [2021-11-07 02:22:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:54,253 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 350 transitions. [2021-11-07 02:22:54,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 350 transitions. [2021-11-07 02:22:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:22:54,254 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:54,254 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] [2021-11-07 02:22:54,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:54,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:54,466 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr109REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:22:54,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash 330554013, now seen corresponding path program 1 times [2021-11-07 02:22:54,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:54,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43571407] [2021-11-07 02:22:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:54,467 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:54,468 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:54,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:22:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:54,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 02:22:54,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-07 02:22:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:22:54,884 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-07 02:22:54,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2021-11-07 02:22:55,204 INFO L354 Elim1Store]: treesize reduction 30, result has 59.5 percent of original size [2021-11-07 02:22:55,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 90 [2021-11-07 02:23:00,057 INFO L354 Elim1Store]: treesize reduction 54, result has 44.9 percent of original size [2021-11-07 02:23:00,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 142 [2021-11-07 02:23:09,646 INFO L354 Elim1Store]: treesize reduction 55, result has 48.1 percent of original size [2021-11-07 02:23:09,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 146 treesize of output 187 [2021-11-07 02:23:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:16,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:19,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:19,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43571407] [2021-11-07 02:23:19,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43571407] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:19,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:19,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 14 [2021-11-07 02:23:19,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505247023] [2021-11-07 02:23:19,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:23:19,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:19,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:23:19,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2021-11-07 02:23:19,535 INFO L87 Difference]: Start difference. First operand 319 states and 350 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-07 02:23:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:28,564 INFO L93 Difference]: Finished difference Result 588 states and 641 transitions. [2021-11-07 02:23:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:23:28,565 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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 21 [2021-11-07 02:23:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:28,568 INFO L225 Difference]: With dead ends: 588 [2021-11-07 02:23:28,568 INFO L226 Difference]: Without dead ends: 588 [2021-11-07 02:23:28,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=198, Invalid=451, Unknown=1, NotChecked=0, Total=650 [2021-11-07 02:23:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-07 02:23:28,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 321. [2021-11-07 02:23:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 204 states have (on average 1.7254901960784315) internal successors, (352), 320 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 352 transitions. [2021-11-07 02:23:28,573 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 352 transitions. Word has length 21 [2021-11-07 02:23:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:28,573 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 352 transitions. [2021-11-07 02:23:28,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-11-07 02:23:28,573 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 352 transitions. [2021-11-07 02:23:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 02:23:28,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:28,574 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] [2021-11-07 02:23:28,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:28,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:28,774 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr111REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:23:28,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:28,775 INFO L85 PathProgramCache]: Analyzing trace with hash -165159266, now seen corresponding path program 1 times [2021-11-07 02:23:28,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:28,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555130576] [2021-11-07 02:23:28,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:28,776 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:28,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:28,777 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:28,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 02:23:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:23:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:29,236 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:23:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 26 [2021-11-07 02:23:29,328 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 18 treesize of output 17 [2021-11-07 02:23:29,387 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 32 treesize of output 24 [2021-11-07 02:23:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:29,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:29,533 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-07 02:23:29,533 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 36 treesize of output 35 [2021-11-07 02:23:31,651 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (or (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) is different from false [2021-11-07 02:23:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:31,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:31,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555130576] [2021-11-07 02:23:31,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555130576] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:31,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:31,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:23:31,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948715990] [2021-11-07 02:23:31,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:23:31,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:23:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=69, Unknown=1, NotChecked=16, Total=110 [2021-11-07 02:23:31,774 INFO L87 Difference]: Start difference. First operand 321 states and 352 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:33,790 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (or (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) (exists ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (and (= (_ bv0 1) (select |c_#valid| ULTIMATE.start_entry_point_~client~0.base)) (or (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))))) is different from false [2021-11-07 02:23:35,802 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (or (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base)))) is different from false [2021-11-07 02:23:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:42,082 INFO L93 Difference]: Finished difference Result 367 states and 399 transitions. [2021-11-07 02:23:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:23:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-07 02:23:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:42,085 INFO L225 Difference]: With dead ends: 367 [2021-11-07 02:23:42,085 INFO L226 Difference]: Without dead ends: 367 [2021-11-07 02:23:42,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=51, Invalid=114, Unknown=3, NotChecked=72, Total=240 [2021-11-07 02:23:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-07 02:23:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 323. [2021-11-07 02:23:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 206 states have (on average 1.7233009708737863) internal successors, (355), 322 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 355 transitions. [2021-11-07 02:23:42,091 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 355 transitions. Word has length 23 [2021-11-07 02:23:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:42,092 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 355 transitions. [2021-11-07 02:23:42,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:42,092 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 355 transitions. [2021-11-07 02:23:42,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 02:23:42,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:42,093 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:42,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-07 02:23:42,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:42,306 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr112REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:23:42,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash -165159265, now seen corresponding path program 1 times [2021-11-07 02:23:42,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:42,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026427194] [2021-11-07 02:23:42,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:42,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:42,307 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:23:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:42,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:23:42,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:42,869 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:23:42,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 44 [2021-11-07 02:23:42,903 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:23:42,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 41 [2021-11-07 02:23:43,117 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 26 treesize of output 25 [2021-11-07 02:23:43,208 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 52 treesize of output 44 [2021-11-07 02:23:43,223 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 41 treesize of output 33 [2021-11-07 02:23:43,236 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:23:43,236 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 30 treesize of output 30 [2021-11-07 02:23:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:43,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:43,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:23:43,425 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 38 treesize of output 42 [2021-11-07 02:23:43,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 12 [2021-11-07 02:23:46,093 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) is different from false [2021-11-07 02:23:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:46,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:46,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026427194] [2021-11-07 02:23:46,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026427194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:46,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:46,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-07 02:23:46,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829135783] [2021-11-07 02:23:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:23:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:23:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2021-11-07 02:23:46,766 INFO L87 Difference]: Start difference. First operand 323 states and 355 transitions. Second operand has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:48,794 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (exists ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (and (or (and (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|)) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base)) (= (_ bv0 1) (select |c_#valid| ULTIMATE.start_entry_point_~client~0.base)))) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|) (= |c_~#ldv_global_msg_list~0.offset| (_ bv0 32))) is different from false [2021-11-07 02:23:50,811 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|) (= |c_~#ldv_global_msg_list~0.offset| (_ bv0 32))) is different from false [2021-11-07 02:23:55,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:55,011 INFO L93 Difference]: Finished difference Result 394 states and 427 transitions. [2021-11-07 02:23:55,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:23:55,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 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 23 [2021-11-07 02:23:55,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:55,014 INFO L225 Difference]: With dead ends: 394 [2021-11-07 02:23:55,014 INFO L226 Difference]: Without dead ends: 394 [2021-11-07 02:23:55,014 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=58, Invalid=133, Unknown=3, NotChecked=78, Total=272 [2021-11-07 02:23:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-07 02:23:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 323. [2021-11-07 02:23:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 206 states have (on average 1.7184466019417475) internal successors, (354), 322 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 354 transitions. [2021-11-07 02:23:55,022 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 354 transitions. Word has length 23 [2021-11-07 02:23:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 354 transitions. [2021-11-07 02:23:55,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 354 transitions. [2021-11-07 02:23:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:23:55,024 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:55,025 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] [2021-11-07 02:23:55,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:55,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:55,237 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr97ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:23:55,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 694912822, now seen corresponding path program 1 times [2021-11-07 02:23:55,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:55,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1798860752] [2021-11-07 02:23:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:55,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:55,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:55,239 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:55,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 02:23:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:55,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:55,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:55,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1798860752] [2021-11-07 02:23:55,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1798860752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:55,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:55,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:23:55,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428385846] [2021-11-07 02:23:55,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:55,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:55,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:55,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:55,776 INFO L87 Difference]: Start difference. First operand 323 states and 354 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:55,888 INFO L93 Difference]: Finished difference Result 1142 states and 1247 transitions. [2021-11-07 02:23:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:55,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-07 02:23:55,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:55,893 INFO L225 Difference]: With dead ends: 1142 [2021-11-07 02:23:55,893 INFO L226 Difference]: Without dead ends: 1142 [2021-11-07 02:23:55,893 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:55,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-11-07 02:23:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 325. [2021-11-07 02:23:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 208 states have (on average 1.7115384615384615) internal successors, (356), 324 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 356 transitions. [2021-11-07 02:23:55,900 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 356 transitions. Word has length 24 [2021-11-07 02:23:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:55,901 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 356 transitions. [2021-11-07 02:23:55,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:55,901 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 356 transitions. [2021-11-07 02:23:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:23:55,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:55,902 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] [2021-11-07 02:23:55,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-07 02:23:56,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:56,115 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr97ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:23:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 694972404, now seen corresponding path program 1 times [2021-11-07 02:23:56,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:56,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969710053] [2021-11-07 02:23:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:56,116 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:56,117 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:56,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 02:23:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:23:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:56,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:56,705 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:56,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969710053] [2021-11-07 02:23:56,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969710053] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:56,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:56,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:23:56,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862745070] [2021-11-07 02:23:56,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:23:56,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:56,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:23:56,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:23:56,706 INFO L87 Difference]: Start difference. First operand 325 states and 356 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:56,761 INFO L93 Difference]: Finished difference Result 364 states and 396 transitions. [2021-11-07 02:23:56,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:23:56,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-11-07 02:23:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:56,763 INFO L225 Difference]: With dead ends: 364 [2021-11-07 02:23:56,763 INFO L226 Difference]: Without dead ends: 364 [2021-11-07 02:23:56,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:23:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-07 02:23:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 324. [2021-11-07 02:23:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 208 states have (on average 1.7067307692307692) internal successors, (355), 323 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 355 transitions. [2021-11-07 02:23:56,769 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 355 transitions. Word has length 24 [2021-11-07 02:23:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:56,769 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 355 transitions. [2021-11-07 02:23:56,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 355 transitions. [2021-11-07 02:23:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 02:23:56,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:56,770 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] [2021-11-07 02:23:56,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-11-07 02:23:56,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:56,987 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr105ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:23:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1777960155, now seen corresponding path program 1 times [2021-11-07 02:23:56,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:56,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [835016202] [2021-11-07 02:23:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:56,988 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:56,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:56,988 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:56,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:23:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:23:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:57,483 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 [2021-11-07 02:23:57,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:23:57,518 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 17 treesize of output 17 [2021-11-07 02:23:57,634 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 02:23:57,634 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 21 treesize of output 26 [2021-11-07 02:23:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:57,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:57,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2021-11-07 02:23:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:23:57,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:57,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [835016202] [2021-11-07 02:23:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [835016202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:57,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:23:57,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 7 [2021-11-07 02:23:57,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528394358] [2021-11-07 02:23:57,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:23:57,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:23:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:23:57,845 INFO L87 Difference]: Start difference. First operand 324 states and 355 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:20,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:20,185 INFO L93 Difference]: Finished difference Result 699 states and 760 transitions. [2021-11-07 02:25:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:25:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 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 24 [2021-11-07 02:25:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:20,190 INFO L225 Difference]: With dead ends: 699 [2021-11-07 02:25:20,190 INFO L226 Difference]: Without dead ends: 699 [2021-11-07 02:25:20,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:25:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-07 02:25:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 327. [2021-11-07 02:25:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 211 states have (on average 1.6966824644549763) internal successors, (358), 326 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 358 transitions. [2021-11-07 02:25:20,197 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 358 transitions. Word has length 24 [2021-11-07 02:25:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:20,197 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 358 transitions. [2021-11-07 02:25:20,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 358 transitions. [2021-11-07 02:25:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:25:20,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:20,198 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:20,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:20,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:20,413 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 67451689, now seen corresponding path program 1 times [2021-11-07 02:25:20,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:20,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600583501] [2021-11-07 02:25:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:20,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:20,415 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:20,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 02:25:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:20,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:25:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:21,056 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 [2021-11-07 02:25:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:21,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:21,301 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:21,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600583501] [2021-11-07 02:25:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600583501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:21,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 02:25:21,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418438140] [2021-11-07 02:25:21,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:25:21,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:25:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:25:21,302 INFO L87 Difference]: Start difference. First operand 327 states and 358 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:23,987 INFO L93 Difference]: Finished difference Result 716 states and 774 transitions. [2021-11-07 02:25:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:25:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:25:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:23,992 INFO L225 Difference]: With dead ends: 716 [2021-11-07 02:25:23,992 INFO L226 Difference]: Without dead ends: 716 [2021-11-07 02:25:23,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:25:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-07 02:25:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 329. [2021-11-07 02:25:23,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 213 states have (on average 1.6948356807511737) internal successors, (361), 328 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:23,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 361 transitions. [2021-11-07 02:25:23,999 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 361 transitions. Word has length 25 [2021-11-07 02:25:23,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:23,999 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 361 transitions. [2021-11-07 02:25:24,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 361 transitions. [2021-11-07 02:25:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:25:24,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:24,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:24,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:24,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:24,217 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:24,217 INFO L85 PathProgramCache]: Analyzing trace with hash 67451688, now seen corresponding path program 1 times [2021-11-07 02:25:24,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:24,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5505077] [2021-11-07 02:25:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:24,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:24,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:24,219 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:24,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-07 02:25:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:24,872 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 [2021-11-07 02:25:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:24,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:24,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5505077] [2021-11-07 02:25:24,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5505077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:24,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:24,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:24,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810855324] [2021-11-07 02:25:24,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:24,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:24,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:24,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:24,969 INFO L87 Difference]: Start difference. First operand 329 states and 361 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:25,805 INFO L93 Difference]: Finished difference Result 507 states and 557 transitions. [2021-11-07 02:25:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:25,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:25:25,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:25,812 INFO L225 Difference]: With dead ends: 507 [2021-11-07 02:25:25,812 INFO L226 Difference]: Without dead ends: 507 [2021-11-07 02:25:25,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:25:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-07 02:25:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 329. [2021-11-07 02:25:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 213 states have (on average 1.6901408450704225) internal successors, (360), 328 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 360 transitions. [2021-11-07 02:25:25,818 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 360 transitions. Word has length 25 [2021-11-07 02:25:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:25,819 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 360 transitions. [2021-11-07 02:25:25,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 360 transitions. [2021-11-07 02:25:25,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:25:25,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:25,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:25,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:26,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:26,036 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr98ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:26,037 INFO L85 PathProgramCache]: Analyzing trace with hash 69308517, now seen corresponding path program 1 times [2021-11-07 02:25:26,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:26,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551131170] [2021-11-07 02:25:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:26,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:26,039 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:26,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 02:25:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:26,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:25:26,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:26,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:26,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551131170] [2021-11-07 02:25:26,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [|ULTIMATE.start_ldv_malloc_#res.base|] [2021-11-07 02:25:26,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1259174444] [2021-11-07 02:25:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:26,830 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:26,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:26,834 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:26,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-07 02:25:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:27,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:27,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:27,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1259174444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:27,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:27,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:27,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632893744] [2021-11-07 02:25:27,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:27,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:27,818 INFO L87 Difference]: Start difference. First operand 329 states and 360 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:28,173 INFO L93 Difference]: Finished difference Result 884 states and 966 transitions. [2021-11-07 02:25:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:25:28,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:28,179 INFO L225 Difference]: With dead ends: 884 [2021-11-07 02:25:28,179 INFO L226 Difference]: Without dead ends: 884 [2021-11-07 02:25:28,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:25:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-07 02:25:28,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 469. [2021-11-07 02:25:28,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 353 states have (on average 1.745042492917847) internal successors, (616), 468 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 616 transitions. [2021-11-07 02:25:28,191 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 616 transitions. Word has length 25 [2021-11-07 02:25:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:28,191 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 616 transitions. [2021-11-07 02:25:28,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 616 transitions. [2021-11-07 02:25:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:25:28,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:28,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:28,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:28,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:28,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:28,598 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash 69298731, now seen corresponding path program 1 times [2021-11-07 02:25:28,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:28,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559704678] [2021-11-07 02:25:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:28,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:28,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:28,601 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:28,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-07 02:25:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:29,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:29,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:29,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:29,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559704678] [2021-11-07 02:25:29,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559704678] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:29,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:29,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:25:29,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292586329] [2021-11-07 02:25:29,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:29,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:29,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:29,418 INFO L87 Difference]: Start difference. First operand 469 states and 616 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:29,547 INFO L93 Difference]: Finished difference Result 916 states and 1188 transitions. [2021-11-07 02:25:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:25:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:29,567 INFO L225 Difference]: With dead ends: 916 [2021-11-07 02:25:29,567 INFO L226 Difference]: Without dead ends: 916 [2021-11-07 02:25:29,567 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:25:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-11-07 02:25:29,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 463. [2021-11-07 02:25:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 349 states have (on average 1.7363896848137537) internal successors, (606), 462 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 606 transitions. [2021-11-07 02:25:29,577 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 606 transitions. Word has length 25 [2021-11-07 02:25:29,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:29,577 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 606 transitions. [2021-11-07 02:25:29,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 606 transitions. [2021-11-07 02:25:29,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 02:25:29,578 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:29,579 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:29,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:29,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:29,787 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr98ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:29,787 INFO L85 PathProgramCache]: Analyzing trace with hash -323718493, now seen corresponding path program 1 times [2021-11-07 02:25:29,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:29,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048644523] [2021-11-07 02:25:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:29,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:29,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:29,789 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:29,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 02:25:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:30,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:30,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:30,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:30,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:30,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048644523] [2021-11-07 02:25:30,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048644523] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:30,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:30,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:25:30,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237197780] [2021-11-07 02:25:30,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:30,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:30,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:30,572 INFO L87 Difference]: Start difference. First operand 463 states and 606 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:30,682 INFO L93 Difference]: Finished difference Result 640 states and 693 transitions. [2021-11-07 02:25:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:25:30,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 02:25:30,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:30,686 INFO L225 Difference]: With dead ends: 640 [2021-11-07 02:25:30,687 INFO L226 Difference]: Without dead ends: 640 [2021-11-07 02:25:30,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:25:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-11-07 02:25:30,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 324. [2021-11-07 02:25:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 211 states have (on average 1.6729857819905214) internal successors, (353), 323 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 353 transitions. [2021-11-07 02:25:30,694 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 353 transitions. Word has length 25 [2021-11-07 02:25:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:30,694 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 353 transitions. [2021-11-07 02:25:30,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 353 transitions. [2021-11-07 02:25:30,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:25:30,695 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:30,695 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] [2021-11-07 02:25:30,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:30,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:30,895 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr99ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:30,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2146402794, now seen corresponding path program 1 times [2021-11-07 02:25:30,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:30,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [301584105] [2021-11-07 02:25:30,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:30,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:30,897 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:30,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-07 02:25:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:31,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:31,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:31,578 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 [2021-11-07 02:25:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:31,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:31,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:31,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [301584105] [2021-11-07 02:25:31,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [301584105] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:31,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:31,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:25:31,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027521481] [2021-11-07 02:25:31,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:25:31,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:25:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:25:31,711 INFO L87 Difference]: Start difference. First operand 324 states and 353 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:32,519 INFO L93 Difference]: Finished difference Result 494 states and 542 transitions. [2021-11-07 02:25:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:25:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-07 02:25:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:32,523 INFO L225 Difference]: With dead ends: 494 [2021-11-07 02:25:32,523 INFO L226 Difference]: Without dead ends: 494 [2021-11-07 02:25:32,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:25:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-07 02:25:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 327. [2021-11-07 02:25:32,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 214 states have (on average 1.6635514018691588) internal successors, (356), 326 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 356 transitions. [2021-11-07 02:25:32,530 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 356 transitions. Word has length 26 [2021-11-07 02:25:32,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:32,530 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 356 transitions. [2021-11-07 02:25:32,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:32,530 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 356 transitions. [2021-11-07 02:25:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:25:32,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:32,531 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] [2021-11-07 02:25:32,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:32,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,732 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr131ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:25:32,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1773270931, now seen corresponding path program 1 times [2021-11-07 02:25:32,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:32,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036323600] [2021-11-07 02:25:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:32,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:32,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:32,733 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:32,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 02:25:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:25:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:36,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:49,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:49,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036323600] [2021-11-07 02:25:49,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036323600] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:49,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:49,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 02:25:49,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229364714] [2021-11-07 02:25:49,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 02:25:49,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 02:25:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=165, Unknown=6, NotChecked=0, Total=210 [2021-11-07 02:25:49,225 INFO L87 Difference]: Start difference. First operand 327 states and 356 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:00,058 INFO L93 Difference]: Finished difference Result 360 states and 390 transitions. [2021-11-07 02:26:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:26:00,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:26:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:00,060 INFO L225 Difference]: With dead ends: 360 [2021-11-07 02:26:00,060 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 02:26:00,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=76, Invalid=297, Unknown=7, NotChecked=0, Total=380 [2021-11-07 02:26:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 02:26:00,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 340. [2021-11-07 02:26:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 227 states have (on average 1.6740088105726871) internal successors, (380), 339 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 380 transitions. [2021-11-07 02:26:00,065 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 380 transitions. Word has length 26 [2021-11-07 02:26:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:00,065 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 380 transitions. [2021-11-07 02:26:00,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 380 transitions. [2021-11-07 02:26:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:26:00,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:00,066 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] [2021-11-07 02:26:00,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:00,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:00,267 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr113REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:26:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1773270945, now seen corresponding path program 1 times [2021-11-07 02:26:00,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:00,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231563451] [2021-11-07 02:26:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:00,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:00,269 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:00,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-07 02:26:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:26:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:01,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:01,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:01,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231563451] [2021-11-07 02:26:01,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231563451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:01,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:01,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:26:01,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065568723] [2021-11-07 02:26:01,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:26:01,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:26:01,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:26:01,066 INFO L87 Difference]: Start difference. First operand 340 states and 380 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:01,746 INFO L93 Difference]: Finished difference Result 384 states and 431 transitions. [2021-11-07 02:26:01,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:26:01,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-07 02:26:01,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:01,748 INFO L225 Difference]: With dead ends: 384 [2021-11-07 02:26:01,748 INFO L226 Difference]: Without dead ends: 384 [2021-11-07 02:26:01,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-07 02:26:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 343. [2021-11-07 02:26:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 231 states have (on average 1.6666666666666667) internal successors, (385), 342 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 385 transitions. [2021-11-07 02:26:01,754 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 385 transitions. Word has length 26 [2021-11-07 02:26:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:01,755 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 385 transitions. [2021-11-07 02:26:01,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 385 transitions. [2021-11-07 02:26:01,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:26:01,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:01,755 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] [2021-11-07 02:26:01,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:01,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:01,956 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr114REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:26:01,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1773270946, now seen corresponding path program 1 times [2021-11-07 02:26:01,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:01,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68329780] [2021-11-07 02:26:01,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:01,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:01,958 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:01,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-07 02:26:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:02,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:26:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:02,849 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:26:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 37 treesize of output 44 [2021-11-07 02:26:02,900 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-07 02:26:02,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 41 [2021-11-07 02:26:03,222 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 26 treesize of output 25 [2021-11-07 02:26:03,368 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 47 treesize of output 39 [2021-11-07 02:26:03,373 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 36 treesize of output 28 [2021-11-07 02:26:03,389 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:26:03,389 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 25 treesize of output 25 [2021-11-07 02:26:03,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:03,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:03,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 11 [2021-11-07 02:26:05,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|)) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) is different from false [2021-11-07 02:26:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:06,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:06,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68329780] [2021-11-07 02:26:06,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68329780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:06,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:06,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 02:26:06,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142632784] [2021-11-07 02:26:06,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:26:06,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:06,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:26:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2021-11-07 02:26:06,299 INFO L87 Difference]: Start difference. First operand 343 states and 385 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:08,312 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|)) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (exists ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (and (or (and (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|)) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base)) (= (_ bv0 1) (select |c_#valid| ULTIMATE.start_entry_point_~client~0.base)))) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|) (= |c_~#ldv_global_msg_list~0.offset| (_ bv0 32))) is different from false [2021-11-07 02:26:10,321 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_entry_point_~client~0.base (_ BitVec 32))) (or (and (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.offset| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.offset)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|)) (forall ((ULTIMATE.start_entry_point_~client~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.base (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| ULTIMATE.start_entry_point_~client~0.base) ULTIMATE.start_entry_point_~client~0.offset ULTIMATE.start_entry_point_~cfg~2.base)) |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.base|))) (= |c_~#ldv_global_msg_list~0.base| ULTIMATE.start_entry_point_~client~0.base))) (= |c_~#ldv_global_msg_list~0.base| (select (select |c_#memory_$Pointer$.base| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|)) (= (select (select |c_#memory_$Pointer$.offset| |c_~#ldv_global_msg_list~0.base|) |c_~#ldv_global_msg_list~0.offset|) |c_~#ldv_global_msg_list~0.offset|) (= |c_~#ldv_global_msg_list~0.offset| (_ bv0 32))) is different from false [2021-11-07 02:26:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:12,309 INFO L93 Difference]: Finished difference Result 330 states and 360 transitions. [2021-11-07 02:26:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:26:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:26:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:12,311 INFO L225 Difference]: With dead ends: 330 [2021-11-07 02:26:12,311 INFO L226 Difference]: Without dead ends: 316 [2021-11-07 02:26:12,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=58, Invalid=133, Unknown=3, NotChecked=78, Total=272 [2021-11-07 02:26:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-07 02:26:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2021-11-07 02:26:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 204 states have (on average 1.696078431372549) internal successors, (346), 315 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 346 transitions. [2021-11-07 02:26:12,316 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 346 transitions. Word has length 26 [2021-11-07 02:26:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 346 transitions. [2021-11-07 02:26:12,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 346 transitions. [2021-11-07 02:26:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:26:12,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:12,318 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] [2021-11-07 02:26:12,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:12,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:12,520 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:26:12,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 396564361, now seen corresponding path program 1 times [2021-11-07 02:26:12,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:12,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286834512] [2021-11-07 02:26:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:12,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:12,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:12,522 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:12,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 02:26:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:26:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:13,453 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-07 02:26:13,453 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 16 treesize of output 21 [2021-11-07 02:26:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:13,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:13,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:13,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286834512] [2021-11-07 02:26:13,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286834512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:13,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:13,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:26:13,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193191236] [2021-11-07 02:26:13,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:26:13,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:13,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:26:13,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:26:13,553 INFO L87 Difference]: Start difference. First operand 316 states and 346 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:14,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:14,089 INFO L93 Difference]: Finished difference Result 338 states and 371 transitions. [2021-11-07 02:26:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:26:14,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 02:26:14,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:14,092 INFO L225 Difference]: With dead ends: 338 [2021-11-07 02:26:14,092 INFO L226 Difference]: Without dead ends: 338 [2021-11-07 02:26:14,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:26:14,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-07 02:26:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 315. [2021-11-07 02:26:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 204 states have (on average 1.6911764705882353) internal successors, (345), 314 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 345 transitions. [2021-11-07 02:26:14,097 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 345 transitions. Word has length 27 [2021-11-07 02:26:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:14,097 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 345 transitions. [2021-11-07 02:26:14,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 345 transitions. [2021-11-07 02:26:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:26:14,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:14,097 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] [2021-11-07 02:26:14,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-07 02:26:14,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:14,298 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:26:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:14,299 INFO L85 PathProgramCache]: Analyzing trace with hash 396564362, now seen corresponding path program 1 times [2021-11-07 02:26:14,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:14,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771658384] [2021-11-07 02:26:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:14,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:14,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:14,300 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:14,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-07 02:26:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:15,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:26:15,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:15,341 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 [2021-11-07 02:26:15,433 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:26:15,434 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 27 treesize of output 29 [2021-11-07 02:26:15,439 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:26:15,439 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 26 treesize of output 22 [2021-11-07 02:26:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:15,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:15,857 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-07 02:26:15,857 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 40 treesize of output 39 [2021-11-07 02:26:16,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 86 treesize of output 82 [2021-11-07 02:26:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:18,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:18,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771658384] [2021-11-07 02:26:18,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771658384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:18,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:18,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 10 [2021-11-07 02:26:18,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472250363] [2021-11-07 02:26:18,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 02:26:18,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 02:26:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 02:26:18,573 INFO L87 Difference]: Start difference. First operand 315 states and 345 transitions. Second operand has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:26:28,228 INFO L93 Difference]: Finished difference Result 457 states and 498 transitions. [2021-11-07 02:26:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:26:28,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 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 [2021-11-07 02:26:28,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:26:28,232 INFO L225 Difference]: With dead ends: 457 [2021-11-07 02:26:28,232 INFO L226 Difference]: Without dead ends: 457 [2021-11-07 02:26:28,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-07 02:26:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-07 02:26:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 314. [2021-11-07 02:26:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 204 states have (on average 1.6862745098039216) internal successors, (344), 313 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 344 transitions. [2021-11-07 02:26:28,237 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 344 transitions. Word has length 27 [2021-11-07 02:26:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:26:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 344 transitions. [2021-11-07 02:26:28,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.2) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:26:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 344 transitions. [2021-11-07 02:26:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:26:28,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:26:28,241 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] [2021-11-07 02:26:28,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-07 02:26:28,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:26:28,445 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr108ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:26:28,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:26:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1673794711, now seen corresponding path program 1 times [2021-11-07 02:26:28,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:26:28,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665610496] [2021-11-07 02:26:28,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:26:28,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:26:28,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:26:28,459 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:26:28,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-07 02:26:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:26:29,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 02:26:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:29,330 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 [2021-11-07 02:26:29,381 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:26:29,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-07 02:26:29,608 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-07 02:26:29,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 56 [2021-11-07 02:26:30,316 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-07 02:26:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 58 treesize of output 67 [2021-11-07 02:26:30,548 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-07 02:26:30,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 74 [2021-11-07 02:26:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:30,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:43,286 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_175| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_177| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_177| (_ bv1 1)))) (or (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_175|)))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_175| (_ bv0 1)) |v_ULTIMATE.start_ldv_malloc_#res.base_177| (_ bv0 1)) c_ULTIMATE.start_entry_point_~client~0.base))))))))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_177|)))))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse0 c_ULTIMATE.start_entry_point_~client~0.base))) (_ bv1 1))))))) is different from false [2021-11-07 02:26:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:26:47,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:26:47,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665610496] [2021-11-07 02:26:47,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665610496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:26:47,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:26:47,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 10] imperfect sequences [] total 17 [2021-11-07 02:26:47,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584254311] [2021-11-07 02:26:47,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:26:47,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:26:47,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:26:47,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=190, Unknown=8, NotChecked=30, Total=306 [2021-11-07 02:26:47,478 INFO L87 Difference]: Start difference. First operand 314 states and 344 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:30:32,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:30:32,968 INFO L93 Difference]: Finished difference Result 642 states and 704 transitions. [2021-11-07 02:30:32,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 02:30:32,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 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 [2021-11-07 02:30:32,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:30:32,971 INFO L225 Difference]: With dead ends: 642 [2021-11-07 02:30:32,972 INFO L226 Difference]: Without dead ends: 642 [2021-11-07 02:30:32,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=174, Invalid=417, Unknown=13, NotChecked=46, Total=650 [2021-11-07 02:30:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-07 02:30:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 317. [2021-11-07 02:30:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 207 states have (on average 1.6763285024154588) internal successors, (347), 316 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:30:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 347 transitions. [2021-11-07 02:30:32,983 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 347 transitions. Word has length 27 [2021-11-07 02:30:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:30:32,983 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 347 transitions. [2021-11-07 02:30:32,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:30:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 347 transitions. [2021-11-07 02:30:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:30:32,984 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:30:32,985 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] [2021-11-07 02:30:32,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (50)] Ended with exit code 0 [2021-11-07 02:30:33,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:30:33,199 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 128 more)] === [2021-11-07 02:30:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:30:33,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1153736662, now seen corresponding path program 1 times [2021-11-07 02:30:33,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:30:33,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413908111] [2021-11-07 02:30:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:30:33,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:30:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:30:33,201 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:30:33,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7876a88-adf5-49be-bdd9-57f36d0eb52e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-07 02:30:34,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:30:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 02:30:34,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:30:34,060 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 [2021-11-07 02:30:34,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:30:34,094 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 16 treesize of output 16 [2021-11-07 02:30:34,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-07 02:30:34,225 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-07 02:30:34,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-07 02:30:34,315 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-07 02:30:34,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2021-11-07 02:30:34,499 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 02:30:34,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 59 treesize of output 50 [2021-11-07 02:30:34,664 INFO L354 Elim1Store]: treesize reduction 42, result has 44.0 percent of original size [2021-11-07 02:30:34,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 62 [2021-11-07 02:30:34,954 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-07 02:30:34,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 44 [2021-11-07 02:30:35,149 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-07 02:30:35,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 71 [2021-11-07 02:30:35,435 INFO L354 Elim1Store]: treesize reduction 63, result has 35.7 percent of original size [2021-11-07 02:30:35,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 87 [2021-11-07 02:30:35,763 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-07 02:30:35,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 141 treesize of output 100 [2021-11-07 02:30:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:30:36,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:30:38,555 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~adapter~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~adapter~0.base) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|)) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))))))))) (_ bv1 1)))) is different from false [2021-11-07 02:30:40,576 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) c_ULTIMATE.start_entry_point_~adapter~0.base)))) (store .cse0 c_ULTIMATE.start_entry_point_~adapter~0.base (store (select .cse0 c_ULTIMATE.start_entry_point_~adapter~0.base) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))))))))) (_ bv1 1)))) is different from false [2021-11-07 02:30:42,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ bv1 1)) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) |c_ULTIMATE.start_ldv_malloc_#res.base|)))) (store .cse0 |c_ULTIMATE.start_ldv_malloc_#res.base| (store (select .cse0 |c_ULTIMATE.start_ldv_malloc_#res.base|) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))))))))) (_ bv1 1)))) is different from false [2021-11-07 02:31:15,451 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_182| (_ BitVec 32)) (ULTIMATE.start_entry_point_~addr~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_180| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_182| (_ bv1 1)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_ldv_malloc_#res.base_182|))) (not (= (_ bv0 1) (bvneg (select .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_180|)))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (select .cse0 c_ULTIMATE.start_entry_point_~client~0.base))) (_ bv1 1)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_180| (_ bv1 1)) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0.base_13| (_ bv1 1)) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_entry_point_~client~0.offset) ULTIMATE.start_entry_point_~addr~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) |v_ULTIMATE.start_ldv_malloc_#res.base_180|)))) (store .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180| (store (select .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180|) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset)))))))))))))))))) is different from false [2021-11-07 02:31:15,984 INFO L354 Elim1Store]: treesize reduction 202, result has 46.4 percent of original size [2021-11-07 02:31:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 612 treesize of output 702 [2021-11-07 02:31:18,612 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~addr~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~fe~2.base (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_180| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base) ULTIMATE.start_entry_point_~cfg~2.offset ULTIMATE.start_entry_point_~fe~2.base)))) (store .cse2 c_ULTIMATE.start_entry_point_~client~0.base (store (store (select .cse2 c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_entry_point_~client~0.offset) ULTIMATE.start_entry_point_~addr~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) |v_ULTIMATE.start_ldv_malloc_#res.base_180|))))) (store .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180| (store (select .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180|) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))) (or (= |v_ULTIMATE.start_ldv_malloc_#res.base_180| c_ULTIMATE.start_entry_point_~client~0.base) (= .cse0 c_ULTIMATE.start_entry_point_~client~0.base) (= c_ULTIMATE.start_entry_point_~cfg~2.base .cse0) (= c_ULTIMATE.start_entry_point_~cfg~2.base |v_ULTIMATE.start_ldv_malloc_#res.base_180|) (= .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_180|)))) is different from false [2021-11-07 02:31:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:31:20,026 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:31:20,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413908111] [2021-11-07 02:31:20,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413908111] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:31:20,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:31:20,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [] total 27 [2021-11-07 02:31:20,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444144622] [2021-11-07 02:31:20,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 02:31:20,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:31:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 02:31:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=407, Unknown=19, NotChecked=230, Total=756 [2021-11-07 02:31:20,028 INFO L87 Difference]: Start difference. First operand 317 states and 347 transitions. Second operand has 28 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 28 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) [2021-11-07 02:31:24,598 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| c_ULTIMATE.start_entry_point_~client~0.base)) (_ bv1 1))) (= c_ULTIMATE.start_entry_point_~cfg~2.base (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset)) (not (= c_ULTIMATE.start_entry_point_~cfg~2.base c_ULTIMATE.start_entry_point_~client~0.base)) (forall ((ULTIMATE.start_entry_point_~addr~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~fe~2.base (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_180| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base) ULTIMATE.start_entry_point_~cfg~2.offset ULTIMATE.start_entry_point_~fe~2.base)))) (store .cse2 c_ULTIMATE.start_entry_point_~client~0.base (store (store (select .cse2 c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_entry_point_~client~0.offset) ULTIMATE.start_entry_point_~addr~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) |v_ULTIMATE.start_ldv_malloc_#res.base_180|))))) (store .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180| (store (select .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180|) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))) (or (= |v_ULTIMATE.start_ldv_malloc_#res.base_180| c_ULTIMATE.start_entry_point_~client~0.base) (= .cse0 c_ULTIMATE.start_entry_point_~client~0.base) (= c_ULTIMATE.start_entry_point_~cfg~2.base .cse0) (= c_ULTIMATE.start_entry_point_~cfg~2.base |v_ULTIMATE.start_ldv_malloc_#res.base_180|) (= .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_180|)))) (= (_ bv0 1) (bvadd (bvneg (select |c_#valid| |c_ULTIMATE.start_ldv_malloc_#res.base|)) (_ bv1 1))) (not (= |c_ULTIMATE.start_ldv_malloc_#res.base| c_ULTIMATE.start_entry_point_~client~0.base))) is different from false [2021-11-07 02:31:26,626 WARN L838 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_entry_point_~cfg~2.base (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset)) (not (= c_ULTIMATE.start_entry_point_~cfg~2.base c_ULTIMATE.start_entry_point_~client~0.base)) (forall ((ULTIMATE.start_entry_point_~addr~0.base (_ BitVec 32)) (ULTIMATE.start_entry_point_~adapter~0.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~cfg~2.offset (_ BitVec 32)) (ULTIMATE.start_entry_point_~fe~2.base (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_180| (_ BitVec 32))) (let ((.cse0 (select (select (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~2.base) ULTIMATE.start_entry_point_~cfg~2.offset ULTIMATE.start_entry_point_~fe~2.base)))) (store .cse2 c_ULTIMATE.start_entry_point_~client~0.base (store (store (select .cse2 c_ULTIMATE.start_entry_point_~client~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_entry_point_~client~0.offset) ULTIMATE.start_entry_point_~addr~0.base) (bvadd (_ bv12 32) c_ULTIMATE.start_entry_point_~client~0.offset) |v_ULTIMATE.start_ldv_malloc_#res.base_180|))))) (store .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180| (store (select .cse1 |v_ULTIMATE.start_ldv_malloc_#res.base_180|) ULTIMATE.start_entry_point_~adapter~0.offset |#funAddr~master_xfer.base|))) c_ULTIMATE.start_entry_point_~client~0.base) c_ULTIMATE.start_entry_point_~client~0.offset))) (or (= |v_ULTIMATE.start_ldv_malloc_#res.base_180| c_ULTIMATE.start_entry_point_~client~0.base) (= .cse0 c_ULTIMATE.start_entry_point_~client~0.base) (= c_ULTIMATE.start_entry_point_~cfg~2.base .cse0) (= c_ULTIMATE.start_entry_point_~cfg~2.base |v_ULTIMATE.start_ldv_malloc_#res.base_180|) (= .cse0 |v_ULTIMATE.start_ldv_malloc_#res.base_180|))))) is different from false