./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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 43f8392da149a5e37da963296eece1aed541fa66405941aca1908b78e9471c4c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:44,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:44,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:44,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:44,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:44,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:44,485 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:44,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:44,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:44,502 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:44,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:44,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:44,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:44,506 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:44,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:44,508 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:44,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:44,510 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:44,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:44,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:44,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:44,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:44,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:44,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:44,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:44,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:44,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:44,543 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:44,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:44,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:44,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:44,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:44,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:44,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:44,552 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:44,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:44,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:44,553 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:44,553 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:44,554 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:44,555 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:44,555 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:07:44,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:44,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:44,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:44,608 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:44,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:44,609 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:44,609 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:07:44,609 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:44,610 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:44,610 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:07:44,611 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:07:44,611 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:44,611 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:07:44,611 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:07:44,612 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:07:44,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:07:44,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:07:44,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:44,613 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:07:44,613 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:07:44,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:44,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:07:44,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:44,614 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:07:44,614 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:07:44,614 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:07:44,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:44,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:44,615 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:07:44,615 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:44,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:44,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:44,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:44,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:44,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:44,616 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:07:44,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:07:44,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:44,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:44,617 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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43f8392da149a5e37da963296eece1aed541fa66405941aca1908b78e9471c4c [2021-11-07 02:07:44,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:44,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:44,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:44,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:44,902 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:44,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i [2021-11-07 02:07:44,985 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/9ddcc7ffb/6b97a0c0c7a94d1a902b5164c09b1d37/FLAG9eb9a8ea3 [2021-11-07 02:07:45,571 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:45,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i [2021-11-07 02:07:45,603 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/9ddcc7ffb/6b97a0c0c7a94d1a902b5164c09b1d37/FLAG9eb9a8ea3 [2021-11-07 02:07:45,947 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/9ddcc7ffb/6b97a0c0c7a94d1a902b5164c09b1d37 [2021-11-07 02:07:45,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:45,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:45,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:45,956 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:45,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:45,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:45" (1/1) ... [2021-11-07 02:07:45,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b70324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:45, skipping insertion in model container [2021-11-07 02:07:45,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:45" (1/1) ... [2021-11-07 02:07:45,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:46,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:46,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:46,429 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 02:07:46,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3fa4e19e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:46, skipping insertion in model container [2021-11-07 02:07:46,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:46,430 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:07:46,432 INFO L168 Benchmark]: Toolchain (without parser) took 478.88 ms. Allocated memory is still 102.8 MB. Free memory was 61.7 MB in the beginning and 72.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:46,433 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:07:46,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 474.51 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 72.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:07:46,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 102.8 MB. Free memory is still 79.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 474.51 ms. Allocated memory is still 102.8 MB. Free memory was 61.5 MB in the beginning and 72.3 MB in the end (delta: -10.9 MB). Peak memory consumption was 8.4 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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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 43f8392da149a5e37da963296eece1aed541fa66405941aca1908b78e9471c4c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:07:48,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:07:48,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:07:48,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:07:48,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:07:48,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:07:48,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:07:48,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:07:48,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:07:48,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:07:48,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:07:48,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:07:48,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:07:48,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:07:48,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:07:48,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:07:48,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:07:48,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:07:48,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:07:48,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:07:48,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:07:48,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:07:48,712 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:07:48,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:07:48,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:07:48,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:07:48,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:07:48,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:07:48,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:07:48,727 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:07:48,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:07:48,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:07:48,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:07:48,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:07:48,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:07:48,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:07:48,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:07:48,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:07:48,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:07:48,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:07:48,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:07:48,738 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:07:48,783 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:07:48,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:07:48,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:07:48,785 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:07:48,785 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:07:48,786 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:07:48,786 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:07:48,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:07:48,786 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:07:48,788 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:07:48,789 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:07:48,789 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:07:48,790 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:07:48,790 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:07:48,790 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:07:48,790 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:07:48,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:07:48,791 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:07:48,791 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:07:48,791 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:07:48,791 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:07:48,792 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:07:48,792 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:07:48,792 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:07:48,792 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:07:48,793 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:07:48,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:07:48,793 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:07:48,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:07:48,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:48,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:07:48,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:07:48,795 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:07:48,795 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:48,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:07:48,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:07:48,796 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_e3aef30a-b9c7-4bd1-8e12-7058584e2910/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43f8392da149a5e37da963296eece1aed541fa66405941aca1908b78e9471c4c [2021-11-07 02:07:49,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:07:49,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:07:49,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:07:49,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:07:49,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:07:49,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i [2021-11-07 02:07:49,361 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/3bce668ac/60d3a3c4c67140a0984998e7ef491c5e/FLAGf7855125e [2021-11-07 02:07:49,970 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:07:49,971 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/sv-benchmarks/c/ldv-memsafety/memleaks_test22_5.i [2021-11-07 02:07:49,986 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/3bce668ac/60d3a3c4c67140a0984998e7ef491c5e/FLAGf7855125e [2021-11-07 02:07:50,240 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/data/3bce668ac/60d3a3c4c67140a0984998e7ef491c5e [2021-11-07 02:07:50,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:07:50,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:07:50,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:50,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:07:50,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:07:50,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:50" (1/1) ... [2021-11-07 02:07:50,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@723a7b17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:50, skipping insertion in model container [2021-11-07 02:07:50,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:07:50" (1/1) ... [2021-11-07 02:07:50,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:07:50,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:50,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:50,844 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:07:50,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:07:50,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:50,944 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:07:50,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:07:51,050 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:07:51,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51 WrapperNode [2021-11-07 02:07:51,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:07:51,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:51,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:07:51,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:07:51,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,148 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:07:51,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:07:51,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:07:51,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:07:51,161 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:07:51,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:07:51,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:07:51,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:07:51,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (1/1) ... [2021-11-07 02:07:51,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:07:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:51,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:07:51,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:07:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:07:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:07:51,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:07:51,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:07:51,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:07:52,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:07:52,026 INFO L299 CfgBuilder]: Removed 50 assume(true) statements. [2021-11-07 02:07:52,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:52 BoogieIcfgContainer [2021-11-07 02:07:52,029 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:07:52,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:07:52,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:07:52,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:07:52,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:07:50" (1/3) ... [2021-11-07 02:07:52,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e90d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:52, skipping insertion in model container [2021-11-07 02:07:52,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:07:51" (2/3) ... [2021-11-07 02:07:52,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e90d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:07:52, skipping insertion in model container [2021-11-07 02:07:52,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:07:52" (3/3) ... [2021-11-07 02:07:52,041 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_5.i [2021-11-07 02:07:52,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:07:52,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2021-11-07 02:07:52,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:07:52,110 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 02:07:52,110 INFO L340 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2021-11-07 02:07:52,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 92 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 02:07:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:07:52,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:52,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:07:52,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:52,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:52,157 INFO L85 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2021-11-07 02:07:52,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:52,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638660552] [2021-11-07 02:07:52,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:52,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:52,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:52,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:07:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:07:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:52,367 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 02:07:52,428 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 02:07:52,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:52,479 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 02:07:52,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:52,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638660552] [2021-11-07 02:07:52,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638660552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:52,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:52,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:52,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950132509] [2021-11-07 02:07:52,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:52,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:52,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:52,508 INFO L87 Difference]: Start difference. First operand has 92 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 91 states have internal predecessors, (102), 0 states have call successors, (0), 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 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:07:53,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:53,168 INFO L93 Difference]: Finished difference Result 268 states and 291 transitions. [2021-11-07 02:07:53,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:53,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:07:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:53,184 INFO L225 Difference]: With dead ends: 268 [2021-11-07 02:07:53,185 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 02:07:53,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 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 02:07:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 02:07:53,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 93. [2021-11-07 02:07:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2021-11-07 02:07:53,246 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 6 [2021-11-07 02:07:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:53,247 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-11-07 02:07:53,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:07:53,258 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2021-11-07 02:07:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 02:07:53,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:53,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 02:07:53,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:53,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:53,472 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:53,475 INFO L85 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2021-11-07 02:07:53,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:53,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081379879] [2021-11-07 02:07:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:53,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:53,481 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:53,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:07:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:53,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:53,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:53,639 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 02:07:53,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:53,677 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 02:07:53,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:53,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081379879] [2021-11-07 02:07:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081379879] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:53,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:53,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:53,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195465171] [2021-11-07 02:07:53,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:53,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:53,688 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:07:53,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:53,741 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2021-11-07 02:07:53,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 02:07:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:53,747 INFO L225 Difference]: With dead ends: 223 [2021-11-07 02:07:53,750 INFO L226 Difference]: Without dead ends: 223 [2021-11-07 02:07:53,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 02:07:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-07 02:07:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 91. [2021-11-07 02:07:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 59 states have (on average 1.7118644067796611) internal successors, (101), 90 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 02:07:53,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-11-07 02:07:53,763 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 6 [2021-11-07 02:07:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:53,767 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-11-07 02:07:53,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states 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 02:07:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-11-07 02:07:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 02:07:53,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:53,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:53,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:53,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:53,981 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:53,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:53,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2021-11-07 02:07:53,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:53,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924501496] [2021-11-07 02:07:53,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:53,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:53,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:53,988 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:54,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:07:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:54,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:07:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:54,100 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 02:07:54,199 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 02:07:54,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:54,489 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 02:07:54,489 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:54,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924501496] [2021-11-07 02:07:54,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924501496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:54,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:54,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:07:54,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230090307] [2021-11-07 02:07:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:07:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:54,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:07:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:07:54,492 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:55,150 INFO L93 Difference]: Finished difference Result 222 states and 242 transitions. [2021-11-07 02:07:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:07:55,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-07 02:07:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:55,153 INFO L225 Difference]: With dead ends: 222 [2021-11-07 02:07:55,153 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 02:07:55,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:07:55,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 02:07:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 90. [2021-11-07 02:07:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.694915254237288) internal successors, (100), 89 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 02:07:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-11-07 02:07:55,161 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 7 [2021-11-07 02:07:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:55,161 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-11-07 02:07:55,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-11-07 02:07:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:07:55,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:55,163 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:55,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:55,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:55,388 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:55,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:55,389 INFO L85 PathProgramCache]: Analyzing trace with hash 119421555, now seen corresponding path program 1 times [2021-11-07 02:07:55,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:55,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868567569] [2021-11-07 02:07:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:55,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:55,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:55,391 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:55,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:07:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:07:55,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:55,516 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 02:07:55,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:55,541 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 02:07:55,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:55,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868567569] [2021-11-07 02:07:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868567569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:55,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:55,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:55,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51526610] [2021-11-07 02:07:55,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:55,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:55,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:55,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:55,547 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:55,571 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2021-11-07 02:07:55,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:07:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 02:07:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:55,573 INFO L225 Difference]: With dead ends: 156 [2021-11-07 02:07:55,573 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 02:07:55,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:07:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 02:07:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 90. [2021-11-07 02:07:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.6779661016949152) internal successors, (99), 89 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 02:07:55,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-11-07 02:07:55,585 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 8 [2021-11-07 02:07:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:55,586 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-11-07 02:07:55,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-11-07 02:07:55,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:07:55,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:55,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:55,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:55,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:55,799 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:55,800 INFO L85 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2021-11-07 02:07:55,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:55,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477817388] [2021-11-07 02:07:55,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:55,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:55,802 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:55,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:07:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:55,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:07:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:55,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:56,006 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 02:07:56,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:56,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477817388] [2021-11-07 02:07:56,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477817388] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:56,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:56,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:07:56,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131260463] [2021-11-07 02:07:56,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:07:56,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:56,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:07:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:07:56,011 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:56,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:56,046 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2021-11-07 02:07:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:56,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 02:07:56,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:56,047 INFO L225 Difference]: With dead ends: 131 [2021-11-07 02:07:56,047 INFO L226 Difference]: Without dead ends: 131 [2021-11-07 02:07:56,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 02:07:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-07 02:07:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2021-11-07 02:07:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states 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 02:07:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-07 02:07:56,052 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 8 [2021-11-07 02:07:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:56,053 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-07 02:07:56,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-07 02:07:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:07:56,054 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:56,054 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:56,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:56,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,265 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:56,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:56,266 INFO L85 PathProgramCache]: Analyzing trace with hash -2007928746, now seen corresponding path program 1 times [2021-11-07 02:07:56,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:56,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1510361883] [2021-11-07 02:07:56,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:56,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:56,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:56,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:07:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:07:56,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:56,396 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 02:07:56,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:56,425 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:56,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1510361883] [2021-11-07 02:07:56,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1510361883] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:56,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:56,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:07:56,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666067667] [2021-11-07 02:07:56,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:07:56,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:07:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:07:56,427 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:56,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:56,557 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-11-07 02:07:56,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:07:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 02:07:56,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:56,558 INFO L225 Difference]: With dead ends: 117 [2021-11-07 02:07:56,558 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 02:07:56,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 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 02:07:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 02:07:56,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2021-11-07 02:07:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.6376811594202898) internal successors, (113), 99 states have internal predecessors, (113), 0 states have call successors, (0), 0 states 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 02:07:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-11-07 02:07:56,563 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 10 [2021-11-07 02:07:56,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:56,563 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-11-07 02:07:56,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:56,564 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-11-07 02:07:56,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 02:07:56,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:56,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:56,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:56,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:56,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2007930219, now seen corresponding path program 1 times [2021-11-07 02:07:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:56,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385018930] [2021-11-07 02:07:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:56,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:56,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:56,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:56,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:07:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:07:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:56,966 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 02:07:56,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:57,010 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 02:07:57,011 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:57,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385018930] [2021-11-07 02:07:57,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385018930] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:57,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:57,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:07:57,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592286308] [2021-11-07 02:07:57,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:07:57,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:57,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:07:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:07:57,029 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:57,079 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-07 02:07:57,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:57,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 02:07:57,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:57,080 INFO L225 Difference]: With dead ends: 97 [2021-11-07 02:07:57,080 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 02:07:57,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 02:07:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-11-07 02:07:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:07:57,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-07 02:07:57,084 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 10 [2021-11-07 02:07:57,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:57,084 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-07 02:07:57,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,084 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-07 02:07:57,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 02:07:57,084 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:57,085 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:57,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:57,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:57,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:57,286 INFO L85 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2021-11-07 02:07:57,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:57,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589088814] [2021-11-07 02:07:57,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:57,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:57,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:57,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:07:57,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:57,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:07:57,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:57,476 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 02:07:57,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:57,515 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 02:07:57,515 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:57,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589088814] [2021-11-07 02:07:57,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589088814] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:57,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:07:57,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:07:57,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809581313] [2021-11-07 02:07:57,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:07:57,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:07:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:07:57,518 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:57,549 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-07 02:07:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:07:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 02:07:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:57,551 INFO L225 Difference]: With dead ends: 90 [2021-11-07 02:07:57,551 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 02:07:57,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:07:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 02:07:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-07 02:07:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 89 states have internal predecessors, (98), 0 states have call successors, (0), 0 states 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 02:07:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-11-07 02:07:57,554 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 12 [2021-11-07 02:07:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-11-07 02:07:57,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:57,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-11-07 02:07:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:07:57,556 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:57,556 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:57,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:57,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2021-11-07 02:07:57,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:57,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462916934] [2021-11-07 02:07:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:57,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:57,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:57,773 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:57,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:07:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:57,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:58,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:07:58,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462916934] [2021-11-07 02:07:58,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462916934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:58,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1696777374] [2021-11-07 02:07:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:58,094 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:07:58,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:07:58,101 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:07:58,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-07 02:07:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:07:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:58,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:07:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1696777374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:07:58,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957031516] [2021-11-07 02:07:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:58,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:07:58,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:07:58,406 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:07:58,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 02:07:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:07:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:07:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:07:58,561 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 02:07:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:58,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:07:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:07:58,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957031516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:07:58,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:07:58,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-11-07 02:07:58,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748284400] [2021-11-07 02:07:58,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:07:58,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:07:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:07:58,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:07:58,815 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:59,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:07:59,270 INFO L93 Difference]: Finished difference Result 219 states and 234 transitions. [2021-11-07 02:07:59,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:07:59,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 02:07:59,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:07:59,272 INFO L225 Difference]: With dead ends: 219 [2021-11-07 02:07:59,272 INFO L226 Difference]: Without dead ends: 219 [2021-11-07 02:07:59,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:07:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-07 02:07:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 89. [2021-11-07 02:07:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 88 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2021-11-07 02:07:59,277 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 14 [2021-11-07 02:07:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:07:59,277 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2021-11-07 02:07:59,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:07:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2021-11-07 02:07:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 02:07:59,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:07:59,278 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:07:59,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:59,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:59,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:07:59,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:07:59,889 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:07:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:07:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2021-11-07 02:07:59,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:07:59,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1790335714] [2021-11-07 02:07:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:07:59,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:07:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:07:59,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:07:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:08:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:00,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:00,258 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:00,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1790335714] [2021-11-07 02:08:00,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1790335714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:00,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451424141] [2021-11-07 02:08:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:00,259 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:00,261 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:00,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:08:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:00,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:00,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451424141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:00,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703595838] [2021-11-07 02:08:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:00,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:00,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:00,560 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:00,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 02:08:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:08:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:00,731 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 02:08:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:01,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703595838] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:01,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:01,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-07 02:08:01,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217202766] [2021-11-07 02:08:01,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:08:01,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:08:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:08:01,587 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 02:08:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:02,334 INFO L93 Difference]: Finished difference Result 222 states and 240 transitions. [2021-11-07 02:08:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:02,335 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 14 [2021-11-07 02:08:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:02,336 INFO L225 Difference]: With dead ends: 222 [2021-11-07 02:08:02,336 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 02:08:02,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:08:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 02:08:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 88. [2021-11-07 02:08:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 87 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 02:08:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-11-07 02:08:02,340 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 14 [2021-11-07 02:08:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:02,341 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-11-07 02:08:02,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 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 02:08:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-11-07 02:08:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:08:02,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:02,342 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:02,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:02,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:08:02,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:02,948 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 1 times [2021-11-07 02:08:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:02,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135933509] [2021-11-07 02:08:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:02,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:02,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:02,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:02,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:08:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:03,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:03,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:03,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:03,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:03,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135933509] [2021-11-07 02:08:03,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135933509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:03,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329251822] [2021-11-07 02:08:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:03,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:03,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:03,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 02:08:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:03,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:03,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:03,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329251822] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:03,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:03,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-11-07 02:08:03,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773312377] [2021-11-07 02:08:03,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:08:03,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:08:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:03,685 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 02:08:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:03,725 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-07 02:08:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:08:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 16 [2021-11-07 02:08:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:03,726 INFO L225 Difference]: With dead ends: 88 [2021-11-07 02:08:03,726 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 02:08:03,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 02:08:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-07 02:08:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 87 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 02:08:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2021-11-07 02:08:03,730 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 16 [2021-11-07 02:08:03,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:03,730 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2021-11-07 02:08:03,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 02:08:03,730 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2021-11-07 02:08:03,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:08:03,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:03,731 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:03,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:03,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2021-11-07 02:08:04,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:04,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384599255] [2021-11-07 02:08:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:04,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:04,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:04,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:08:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:04,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,544 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:04,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384599255] [2021-11-07 02:08:04,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384599255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:04,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1513576584] [2021-11-07 02:08:04,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,544 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:04,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:04,545 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:04,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 02:08:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:04,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:04,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:04,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1513576584] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:04,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116746528] [2021-11-07 02:08:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:04,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:04,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:04,924 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:04,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 02:08:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:05,151 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 02:08:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:05,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:05,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116746528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:05,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:05,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-11-07 02:08:05,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044807678] [2021-11-07 02:08:05,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:05,376 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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 02:08:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:05,785 INFO L93 Difference]: Finished difference Result 165 states and 176 transitions. [2021-11-07 02:08:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:08:05,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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 16 [2021-11-07 02:08:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:05,787 INFO L225 Difference]: With dead ends: 165 [2021-11-07 02:08:05,787 INFO L226 Difference]: Without dead ends: 165 [2021-11-07 02:08:05,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-07 02:08:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-07 02:08:05,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 86. [2021-11-07 02:08:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 59 states have (on average 1.576271186440678) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-11-07 02:08:05,790 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 16 [2021-11-07 02:08:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:05,796 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-11-07 02:08:05,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 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 02:08:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-11-07 02:08:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:08:05,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:05,798 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:05,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:06,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:06,401 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:06,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:06,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2021-11-07 02:08:06,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:06,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581040930] [2021-11-07 02:08:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:06,403 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:06,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 02:08:06,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:06,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:06,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:06,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:06,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581040930] [2021-11-07 02:08:06,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581040930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:06,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32161221] [2021-11-07 02:08:06,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:06,781 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:06,782 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:06,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 02:08:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:07,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:07,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:07,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32161221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:07,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629591718] [2021-11-07 02:08:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:07,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:07,221 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 02:08:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 02:08:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:07,502 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 02:08:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:07,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:08,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629591718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:08,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:08,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-07 02:08:08,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930376884] [2021-11-07 02:08:08,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:08:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:08:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:08:08,311 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 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 02:08:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:08,925 INFO L93 Difference]: Finished difference Result 151 states and 163 transitions. [2021-11-07 02:08:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 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 16 [2021-11-07 02:08:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:08,927 INFO L225 Difference]: With dead ends: 151 [2021-11-07 02:08:08,927 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 02:08:08,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-11-07 02:08:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 02:08:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 84. [2021-11-07 02:08:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 02:08:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2021-11-07 02:08:08,935 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 16 [2021-11-07 02:08:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:08,935 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2021-11-07 02:08:08,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 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 02:08:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2021-11-07 02:08:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:08:08,936 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:08,936 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:08,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:09,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-07 02:08:09,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-11-07 02:08:09,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:09,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:09,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1202804242, now seen corresponding path program 1 times [2021-11-07 02:08:09,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:09,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721267714] [2021-11-07 02:08:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:09,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:09,539 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:09,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:08:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:10,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:10,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721267714] [2021-11-07 02:08:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721267714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:10,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772417665] [2021-11-07 02:08:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:10,030 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:10,032 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:10,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 02:08:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:10,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:10,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:10,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772417665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:10,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:10,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-11-07 02:08:10,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818500534] [2021-11-07 02:08:10,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:10,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:10,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:10,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:10,491 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:10,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:10,559 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2021-11-07 02:08:10,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:10,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 02:08:10,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:10,560 INFO L225 Difference]: With dead ends: 84 [2021-11-07 02:08:10,560 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 02:08:10,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:08:10,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 02:08:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-07 02:08:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.5254237288135593) internal successors, (90), 83 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 02:08:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2021-11-07 02:08:10,562 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 17 [2021-11-07 02:08:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:10,563 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2021-11-07 02:08:10,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2021-11-07 02:08:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:08:10,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:10,564 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:10,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:10,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-11-07 02:08:10,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:10,973 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2021-11-07 02:08:10,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:10,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943094836] [2021-11-07 02:08:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:10,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:10,974 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:10,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 02:08:11,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:11,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943094836] [2021-11-07 02:08:11,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943094836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:11,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [885274628] [2021-11-07 02:08:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:11,414 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:11,415 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:11,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 02:08:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:11,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:11,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:11,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [885274628] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:11,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960783874] [2021-11-07 02:08:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:11,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:11,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:11,876 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:11,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 02:08:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:12,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 02:08:12,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:12,169 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 02:08:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:12,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:12,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960783874] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:12,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:12,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-11-07 02:08:12,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858635341] [2021-11-07 02:08:12,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:12,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:12,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:08:12,383 INFO L87 Difference]: Start difference. First operand 84 states and 90 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 02:08:12,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:12,709 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-07 02:08:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:08:12,709 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 21 [2021-11-07 02:08:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:12,710 INFO L225 Difference]: With dead ends: 116 [2021-11-07 02:08:12,710 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 02:08:12,710 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:08:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 02:08:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2021-11-07 02:08:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 80 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 02:08:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-11-07 02:08:12,714 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 21 [2021-11-07 02:08:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:12,714 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-11-07 02:08:12,715 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 02:08:12,715 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-11-07 02:08:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-07 02:08:12,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:12,716 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:12,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:12,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:13,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:13,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:13,322 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:13,322 INFO L85 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2021-11-07 02:08:13,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:13,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119567826] [2021-11-07 02:08:13,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:13,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:13,325 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:13,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 02:08:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:13,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:13,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:13,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:13,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:13,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:13,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119567826] [2021-11-07 02:08:13,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119567826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:13,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [277484666] [2021-11-07 02:08:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:13,805 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:13,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:13,821 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:13,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 02:08:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:14,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:14,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:14,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:14,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [277484666] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:14,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996047935] [2021-11-07 02:08:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:14,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:14,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:14,367 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:14,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 02:08:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 02:08:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:14,721 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 02:08:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:14,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996047935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:15,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:15,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-07 02:08:15,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129614391] [2021-11-07 02:08:15,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:08:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:08:15,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 02:08:15,517 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 02:08:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:16,117 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-07 02:08:16,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:16,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 02:08:16,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:16,119 INFO L225 Difference]: With dead ends: 84 [2021-11-07 02:08:16,119 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 02:08:16,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-11-07 02:08:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 02:08:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-11-07 02:08:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.423728813559322) internal successors, (84), 77 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 02:08:16,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-11-07 02:08:16,122 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 21 [2021-11-07 02:08:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:16,122 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-11-07 02:08:16,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states 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 02:08:16,122 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-11-07 02:08:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-07 02:08:16,122 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:16,123 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:16,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:16,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-07 02:08:16,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 02:08:16,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:16,726 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:16,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1037587296, now seen corresponding path program 1 times [2021-11-07 02:08:16,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:16,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659851190] [2021-11-07 02:08:16,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:16,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:16,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:16,728 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:16,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-07 02:08:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:17,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:17,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:17,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:17,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:17,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659851190] [2021-11-07 02:08:17,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659851190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:17,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914160487] [2021-11-07 02:08:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:17,264 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:17,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:17,269 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:17,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-07 02:08:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:17,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:17,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914160487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:17,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:17,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-11-07 02:08:17,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498526170] [2021-11-07 02:08:17,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:08:17,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:17,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:08:17,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:08:17,864 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 02:08:17,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:17,922 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-11-07 02:08:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 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 02:08:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:17,924 INFO L225 Difference]: With dead ends: 78 [2021-11-07 02:08:17,924 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 02:08:17,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:08:17,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 02:08:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-11-07 02:08:17,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 77 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 02:08:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2021-11-07 02:08:17,927 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 23 [2021-11-07 02:08:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:17,927 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2021-11-07 02:08:17,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states 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 02:08:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2021-11-07 02:08:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:08:17,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:17,928 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:17,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:18,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-07 02:08:18,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:18,333 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:18,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1677767041, now seen corresponding path program 1 times [2021-11-07 02:08:18,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:18,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929231306] [2021-11-07 02:08:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:18,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:18,336 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:18,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 02:08:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:18,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:18,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929231306] [2021-11-07 02:08:18,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929231306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:18,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [999843736] [2021-11-07 02:08:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:18,895 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:18,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:18,896 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:18,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-07 02:08:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:19,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:19,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:19,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:19,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [999843736] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:19,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385796240] [2021-11-07 02:08:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:19,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:19,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:19,525 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:19,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 02:08:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:19,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:08:19,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:19,925 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 02:08:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:20,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:08:20,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385796240] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:20,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:20,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 16 [2021-11-07 02:08:20,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072831457] [2021-11-07 02:08:20,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:20,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:08:20,226 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) 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 02:08:20,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:20,615 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-11-07 02:08:20,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:08:20,615 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) 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 27 [2021-11-07 02:08:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:20,616 INFO L225 Difference]: With dead ends: 102 [2021-11-07 02:08:20,616 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 02:08:20,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 138 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:08:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 02:08:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2021-11-07 02:08:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-11-07 02:08:20,618 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 27 [2021-11-07 02:08:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:20,618 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-11-07 02:08:20,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) 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 02:08:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-11-07 02:08:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 02:08:20,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:20,620 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:20,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-07 02:08:20,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2021-11-07 02:08:21,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:21,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:21,226 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:21,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:21,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1677767040, now seen corresponding path program 1 times [2021-11-07 02:08:21,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:21,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640543289] [2021-11-07 02:08:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:21,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:21,228 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:21,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 02:08:21,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:21,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:21,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:21,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640543289] [2021-11-07 02:08:21,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640543289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:21,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [819920141] [2021-11-07 02:08:21,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:21,832 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:21,833 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:21,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-07 02:08:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:08:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:22,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [819920141] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:22,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319715965] [2021-11-07 02:08:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:22,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:22,531 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:22,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 02:08:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:22,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:08:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:23,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319715965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:23,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:08:23,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579560577] [2021-11-07 02:08:23,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:08:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:08:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:08:23,248 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 02:08:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:23,407 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-11-07 02:08:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:08:23,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 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 02:08:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:23,410 INFO L225 Difference]: With dead ends: 79 [2021-11-07 02:08:23,410 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 02:08:23,410 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-11-07 02:08:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 02:08:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-07 02:08:23,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 02:08:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-11-07 02:08:23,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 27 [2021-11-07 02:08:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:23,414 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-11-07 02:08:23,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 02:08:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-11-07 02:08:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:08:23,416 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:23,416 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:23,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-07 02:08:23,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:23,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:24,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:24,043 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:24,043 INFO L85 PathProgramCache]: Analyzing trace with hash -460507264, now seen corresponding path program 2 times [2021-11-07 02:08:24,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:24,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279304859] [2021-11-07 02:08:24,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:24,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:24,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:24,045 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:24,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-07 02:08:24,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 02:08:24,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:24,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 02:08:24,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:24,481 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 02:08:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:24,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:25,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:25,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279304859] [2021-11-07 02:08:25,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279304859] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:25,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:08:25,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2021-11-07 02:08:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934862788] [2021-11-07 02:08:25,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:08:25,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:08:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:08:25,433 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 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 02:08:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:26,278 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2021-11-07 02:08:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:08:26,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 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 31 [2021-11-07 02:08:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:26,279 INFO L225 Difference]: With dead ends: 101 [2021-11-07 02:08:26,280 INFO L226 Difference]: Without dead ends: 101 [2021-11-07 02:08:26,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:08:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-07 02:08:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2021-11-07 02:08:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 02:08:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-11-07 02:08:26,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 31 [2021-11-07 02:08:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:26,283 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-11-07 02:08:26,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 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 02:08:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-11-07 02:08:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:08:26,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:26,284 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:26,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:26,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:26,497 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:26,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash -846344435, now seen corresponding path program 1 times [2021-11-07 02:08:26,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:26,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121599076] [2021-11-07 02:08:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:26,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:26,500 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:26,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-07 02:08:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:26,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:27,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:27,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:27,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121599076] [2021-11-07 02:08:27,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121599076] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:27,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [857921377] [2021-11-07 02:08:27,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:27,455 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:27,456 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:27,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-07 02:08:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:08:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:28,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:28,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [857921377] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:28,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:28,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [10, 10] total 24 [2021-11-07 02:08:28,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484985678] [2021-11-07 02:08:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:28,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:08:28,441 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 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 02:08:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:28,863 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2021-11-07 02:08:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:08:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 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 34 [2021-11-07 02:08:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:28,866 INFO L225 Difference]: With dead ends: 96 [2021-11-07 02:08:28,866 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 02:08:28,867 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:08:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 02:08:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-11-07 02:08:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states 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 02:08:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-11-07 02:08:28,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 34 [2021-11-07 02:08:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:28,870 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-11-07 02:08:28,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 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 02:08:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-11-07 02:08:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:08:28,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:28,871 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:28,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-07 02:08:29,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-11-07 02:08:29,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:29,281 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:29,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:29,282 INFO L85 PathProgramCache]: Analyzing trace with hash 332807720, now seen corresponding path program 1 times [2021-11-07 02:08:29,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:29,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013526051] [2021-11-07 02:08:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:29,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:29,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:29,296 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:29,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-07 02:08:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:29,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:29,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:29,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:30,333 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:30,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013526051] [2021-11-07 02:08:30,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013526051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:30,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260277835] [2021-11-07 02:08:30,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:30,333 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:30,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:30,334 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:30,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-07 02:08:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:08:31,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:31,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260277835] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:31,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:08:31,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [10, 10] total 23 [2021-11-07 02:08:31,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785524584] [2021-11-07 02:08:31,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:08:31,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:08:31,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:08:31,314 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 7 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 02:08:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:31,391 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-07 02:08:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:08:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 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 35 [2021-11-07 02:08:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:31,394 INFO L225 Difference]: With dead ends: 76 [2021-11-07 02:08:31,394 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 02:08:31,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-11-07 02:08:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 02:08:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-07 02:08:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-07 02:08:31,397 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 35 [2021-11-07 02:08:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-07 02:08:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 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 02:08:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-07 02:08:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:08:31,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:31,398 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:31,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:31,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-11-07 02:08:31,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:31,812 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:31,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:31,812 INFO L85 PathProgramCache]: Analyzing trace with hash 332806247, now seen corresponding path program 1 times [2021-11-07 02:08:31,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:31,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711799041] [2021-11-07 02:08:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:31,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:31,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:31,813 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:31,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-07 02:08:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:32,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:32,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:32,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:32,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711799041] [2021-11-07 02:08:32,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711799041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:32,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1958777562] [2021-11-07 02:08:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:32,844 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:32,845 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:32,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-07 02:08:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:33,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:33,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:33,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1958777562] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:33,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320661369] [2021-11-07 02:08:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:33,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:33,836 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:33,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 02:08:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:34,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 02:08:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:34,516 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 02:08:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:34,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:35,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320661369] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:35,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:35,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [10, 10, 10, 10] total 32 [2021-11-07 02:08:35,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287311926] [2021-11-07 02:08:35,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 02:08:35,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 02:08:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2021-11-07 02:08:35,886 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:36,475 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-11-07 02:08:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:36,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-07 02:08:36,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:36,477 INFO L225 Difference]: With dead ends: 75 [2021-11-07 02:08:36,477 INFO L226 Difference]: Without dead ends: 75 [2021-11-07 02:08:36,477 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 02:08:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-07 02:08:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-07 02:08:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 63 states have (on average 1.253968253968254) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-07 02:08:36,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 35 [2021-11-07 02:08:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:36,480 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-07 02:08:36,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.933333333333333) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:36,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-07 02:08:36,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-07 02:08:36,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:36,480 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:36,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-07 02:08:36,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:36,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:37,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:37,086 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:37,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash 332806246, now seen corresponding path program 1 times [2021-11-07 02:08:37,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:37,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503359004] [2021-11-07 02:08:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:37,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:37,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:37,088 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:37,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-07 02:08:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:37,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:37,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:37,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:38,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:38,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503359004] [2021-11-07 02:08:38,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503359004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:38,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284431062] [2021-11-07 02:08:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:38,146 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:38,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:38,147 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:38,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-07 02:08:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:39,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:39,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284431062] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:39,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546308956] [2021-11-07 02:08:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:39,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:39,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:39,201 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:39,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 02:08:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:08:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:39,948 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 02:08:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:40,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 02:08:40,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546308956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:08:40,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:08:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [10, 10, 10, 10] total 24 [2021-11-07 02:08:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076019710] [2021-11-07 02:08:40,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:08:40,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:08:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-11-07 02:08:40,360 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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 02:08:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:40,683 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2021-11-07 02:08:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:08:40,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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 35 [2021-11-07 02:08:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:40,684 INFO L225 Difference]: With dead ends: 102 [2021-11-07 02:08:40,684 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 02:08:40,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-11-07 02:08:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 02:08:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-11-07 02:08:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 02:08:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-07 02:08:40,687 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 35 [2021-11-07 02:08:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:40,687 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-07 02:08:40,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 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 02:08:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-07 02:08:40,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 02:08:40,688 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:40,689 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:40,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:40,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-07 02:08:41,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:41,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:41,292 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:41,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1988926237, now seen corresponding path program 1 times [2021-11-07 02:08:41,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:41,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599441675] [2021-11-07 02:08:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:41,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:41,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:41,294 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:41,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-07 02:08:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:41,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:42,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:42,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [599441675] [2021-11-07 02:08:42,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [599441675] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:42,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119839592] [2021-11-07 02:08:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:42,397 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:42,398 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:42,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2021-11-07 02:08:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:08:43,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:43,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:43,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119839592] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:43,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033867582] [2021-11-07 02:08:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:08:43,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:43,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:43,488 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:43,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 02:08:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:08:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:08:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:44,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:45,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033867582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:45,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:45,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 25 [2021-11-07 02:08:45,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432297852] [2021-11-07 02:08:45,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 02:08:45,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:45,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 02:08:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-11-07 02:08:45,097 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:45,587 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-11-07 02:08:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 02:08:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 02:08:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:45,588 INFO L225 Difference]: With dead ends: 88 [2021-11-07 02:08:45,588 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 02:08:45,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=715, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 02:08:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 02:08:45,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-11-07 02:08:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-07 02:08:45,591 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 37 [2021-11-07 02:08:45,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:45,591 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-07 02:08:45,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-07 02:08:45,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:08:45,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:45,592 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:08:45,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2021-11-07 02:08:45,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 02:08:46,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (51)] Ended with exit code 0 [2021-11-07 02:08:46,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:46,197 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:46,197 INFO L85 PathProgramCache]: Analyzing trace with hash -302762269, now seen corresponding path program 2 times [2021-11-07 02:08:46,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:46,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973364114] [2021-11-07 02:08:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:46,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:46,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:46,199 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:46,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-07 02:08:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:08:46,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:47,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:48,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:08:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973364114] [2021-11-07 02:08:48,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973364114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:48,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [402619991] [2021-11-07 02:08:48,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:48,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:08:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:08:48,022 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:08:48,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2021-11-07 02:08:49,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:49,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:08:49,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:49,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [402619991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:49,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051060882] [2021-11-07 02:08:49,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:08:49,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:08:49,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:08:49,547 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:08:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 02:08:50,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:08:50,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:50,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:08:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:50,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:08:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:08:53,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051060882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:08:53,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:08:53,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 49 [2021-11-07 02:08:53,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686214179] [2021-11-07 02:08:53,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 02:08:53,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:08:53,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 02:08:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 02:08:53,283 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:08:55,645 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-07 02:08:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 02:08:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:08:55,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:08:55,647 INFO L225 Difference]: With dead ends: 104 [2021-11-07 02:08:55,647 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 02:08:55,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=994, Invalid=3166, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 02:08:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 02:08:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-07 02:08:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 92 states have (on average 1.184782608695652) internal successors, (109), 103 states have internal predecessors, (109), 0 states have call successors, (0), 0 states 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 02:08:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-11-07 02:08:55,653 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 45 [2021-11-07 02:08:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:08:55,653 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-11-07 02:08:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 49 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:08:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-11-07 02:08:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 02:08:55,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:08:55,654 INFO L513 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 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 02:08:55,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:55,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2021-11-07 02:08:56,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (54)] Ended with exit code 0 [2021-11-07 02:08:56,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:08:56,282 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 30 more)] === [2021-11-07 02:08:56,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:08:56,282 INFO L85 PathProgramCache]: Analyzing trace with hash -551904413, now seen corresponding path program 3 times [2021-11-07 02:08:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:08:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455045104] [2021-11-07 02:08:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:08:56,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:08:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:08:56,283 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:08:56,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2021-11-07 02:08:57,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 02:08:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:08:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 02:08:57,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:08:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 02:08:57,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,721 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-07 02:08:57,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-07 02:08:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 53 [2021-11-07 02:08:57,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2021-11-07 02:08:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 80 [2021-11-07 02:08:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 94 [2021-11-07 02:08:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 109 [2021-11-07 02:08:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 122 [2021-11-07 02:08:58,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,084 INFO L354 Elim1Store]: treesize reduction 264, result has 23.3 percent of original size [2021-11-07 02:08:59,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 36 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 9 case distinctions, treesize of input 114 treesize of output 137 [2021-11-07 02:08:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,550 INFO L354 Elim1Store]: treesize reduction 412, result has 17.9 percent of original size [2021-11-07 02:08:59,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 36 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 126 treesize of output 152 [2021-11-07 02:08:59,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:08:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,045 INFO L354 Elim1Store]: treesize reduction 574, result has 14.8 percent of original size [2021-11-07 02:09:00,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 36 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 30 case distinctions, treesize of input 138 treesize of output 167 [2021-11-07 02:09:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:00,670 INFO L354 Elim1Store]: treesize reduction 750, result has 12.8 percent of original size [2021-11-07 02:09:00,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 36 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 42 case distinctions, treesize of input 150 treesize of output 182 [2021-11-07 02:09:01,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,493 INFO L354 Elim1Store]: treesize reduction 940, result has 11.3 percent of original size [2021-11-07 02:09:01,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 36 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 55 case distinctions, treesize of input 162 treesize of output 197 [2021-11-07 02:09:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:01,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,430 INFO L354 Elim1Store]: treesize reduction 1144, result has 10.2 percent of original size [2021-11-07 02:09:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 36 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 69 case distinctions, treesize of input 174 treesize of output 212 [2021-11-07 02:09:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:03,256 INFO L354 Elim1Store]: treesize reduction 936, result has 7.9 percent of original size [2021-11-07 02:09:03,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 57 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 114 case distinctions, treesize of input 154 treesize of output 195 [2021-11-07 02:09:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:05,960 INFO L354 Elim1Store]: treesize reduction 2434, result has 1.3 percent of original size [2021-11-07 02:09:05,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 78 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 91 case distinctions, treesize of input 211 treesize of output 167 [2021-11-07 02:09:06,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:06,817 INFO L354 Elim1Store]: treesize reduction 456, result has 6.4 percent of original size [2021-11-07 02:09:06,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 36 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 33 case distinctions, treesize of input 130 treesize of output 153 [2021-11-07 02:09:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:07,356 INFO L354 Elim1Store]: treesize reduction 480, result has 6.1 percent of original size [2021-11-07 02:09:07,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 36 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 69 case distinctions, treesize of input 136 treesize of output 159 [2021-11-07 02:09:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 02:09:09,104 INFO L354 Elim1Store]: treesize reduction 789, result has 3.4 percent of original size [2021-11-07 02:09:09,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 69 case distinctions, treesize of input 148 treesize of output 136 [2021-11-07 02:09:09,871 INFO L354 Elim1Store]: treesize reduction 306, result has 0.3 percent of original size [2021-11-07 02:09:09,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 36 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 107 treesize of output 49 [2021-11-07 02:09:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:09:10,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:09:10,434 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:09:10,435 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-11-07 02:09:12,968 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:09:12,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 175 [2021-11-07 02:18:21,302 WARN L207 SmtUtils]: Spent 1.11 m on a formula simplification. DAG size of input: 457 DAG size of output: 82 [2021-11-07 02:18:21,304 INFO L354 Elim1Store]: treesize reduction 9338, result has 2.2 percent of original size [2021-11-07 02:18:21,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 16 case distinctions, treesize of input 170 treesize of output 245 [2021-11-07 02:18:21,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:18:21,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 245 treesize of output 219 [2021-11-07 02:18:21,867 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 260 treesize of output 258 [2021-11-07 02:18:28,697 WARN L207 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 590 DAG size of output: 110 [2021-11-07 02:18:28,698 INFO L354 Elim1Store]: treesize reduction 1650, result has 9.6 percent of original size [2021-11-07 02:18:28,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 4549 treesize of output 4613 [2021-11-07 02:18:28,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:18:28,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455045104] [2021-11-07 02:18:28,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 02:18:28,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2072879775] [2021-11-07 02:18:28,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:18:28,846 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:18:28,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:18:28,848 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:18:28,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2021-11-07 02:18:31,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-07 02:18:31,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349123199] [2021-11-07 02:18:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:18:31,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:18:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:18:31,788 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:18:31,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 02:18:31,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3aef30a-b9c7-4bd1-8e12-7058584e2910/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 1