./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:50:48,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:50:48,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:50:48,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:50:48,566 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:50:48,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:50:48,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:50:48,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:50:48,574 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:50:48,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:50:48,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:50:48,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:50:48,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:50:48,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:50:48,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:50:48,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:50:48,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:50:48,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:50:48,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:50:48,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:50:48,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:50:48,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:50:48,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:50:48,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:50:48,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:50:48,598 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:50:48,598 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:50:48,599 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:50:48,600 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:50:48,601 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:50:48,601 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:50:48,602 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:50:48,603 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:50:48,604 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:50:48,605 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:50:48,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:50:48,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:50:48,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:50:48,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:50:48,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:50:48,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:50:48,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 03:50:48,635 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:50:48,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:50:48,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:50:48,636 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:50:48,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:50:48,636 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:50:48,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 03:50:48,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:50:48,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:50:48,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 03:50:48,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 03:50:48,638 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:50:48,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 03:50:48,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 03:50:48,638 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 03:50:48,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:50:48,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:50:48,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:50:48,640 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:50:48,640 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:50:48,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:50:48,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:50:48,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:50:48,641 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:50:48,641 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:50:48,641 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:50:48,641 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:50:48,641 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:50:48,642 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:50:48,642 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:50:48,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:50:48,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:50:48,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:50:48,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:50:48,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:50:48,643 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 03:50:48,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 03:50:48,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:50:48,644 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:50:48,644 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_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 [2021-11-03 03:50:48,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:50:48,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:50:48,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:50:48,896 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:50:48,901 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:50:48,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-03 03:50:49,011 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/28bfe5a52/74d4c4053cae4e10bfc440b3a258b0ee/FLAGb22a7933d [2021-11-03 03:50:49,559 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:50:49,560 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-03 03:50:49,595 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/28bfe5a52/74d4c4053cae4e10bfc440b3a258b0ee/FLAGb22a7933d [2021-11-03 03:50:49,831 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/28bfe5a52/74d4c4053cae4e10bfc440b3a258b0ee [2021-11-03 03:50:49,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:50:49,835 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:50:49,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:50:49,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:50:49,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:50:49,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:49" (1/1) ... [2021-11-03 03:50:49,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629bbf71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:49, skipping insertion in model container [2021-11-03 03:50:49,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:49" (1/1) ... [2021-11-03 03:50:49,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:50:49,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:50:50,287 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-03 03:50:50,473 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-03 03:50:50,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-03 03:50:50,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:50:50,505 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 03:50:50,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4446d07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:50, skipping insertion in model container [2021-11-03 03:50:50,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:50:50,508 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 03:50:50,510 INFO L168 Benchmark]: Toolchain (without parser) took 673.65 ms. Allocated memory is still 96.5 MB. Free memory was 61.2 MB in the beginning and 61.3 MB in the end (delta: -117.2 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:50,511 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 03:50:50,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.03 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 61.3 MB in the end (delta: -304.4 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 03:50:50,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 96.5 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 668.03 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 61.3 MB in the end (delta: -304.4 kB). 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: 716]: 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_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 03:50:52,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 03:50:52,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 03:50:52,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 03:50:52,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 03:50:52,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 03:50:52,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 03:50:52,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 03:50:52,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 03:50:52,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 03:50:52,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 03:50:52,753 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 03:50:52,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 03:50:52,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 03:50:52,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 03:50:52,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 03:50:52,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 03:50:52,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 03:50:52,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 03:50:52,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 03:50:52,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 03:50:52,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 03:50:52,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 03:50:52,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 03:50:52,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 03:50:52,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 03:50:52,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 03:50:52,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 03:50:52,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 03:50:52,778 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 03:50:52,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 03:50:52,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 03:50:52,780 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 03:50:52,781 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 03:50:52,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 03:50:52,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 03:50:52,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 03:50:52,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 03:50:52,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 03:50:52,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 03:50:52,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 03:50:52,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 03:50:52,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 03:50:52,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 03:50:52,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 03:50:52,840 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 03:50:52,840 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 03:50:52,840 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 03:50:52,840 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 03:50:52,841 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 03:50:52,841 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 03:50:52,842 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 03:50:52,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 03:50:52,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 03:50:52,842 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 03:50:52,842 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 03:50:52,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 03:50:52,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 03:50:52,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 03:50:52,843 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 03:50:52,843 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 03:50:52,844 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 03:50:52,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 03:50:52,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 03:50:52,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 03:50:52,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 03:50:52,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:50:52,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 03:50:52,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 03:50:52,846 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 03:50:52,846 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 03:50:52,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 03:50:52,847 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 03:50:52,847 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_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22b4144b7005899e18ff8135fa52f12863f7106dbe1ddb808d25d8593c5f8fc4 [2021-11-03 03:50:53,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 03:50:53,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 03:50:53,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 03:50:53,224 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 03:50:53,225 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 03:50:53,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-03 03:50:53,299 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/7c143028b/cb37614034e24d739fab8cbe8ea2a0ba/FLAG9e5fe4b3c [2021-11-03 03:50:53,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 03:50:53,988 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i [2021-11-03 03:50:54,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/7c143028b/cb37614034e24d739fab8cbe8ea2a0ba/FLAG9e5fe4b3c [2021-11-03 03:50:54,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/data/7c143028b/cb37614034e24d739fab8cbe8ea2a0ba [2021-11-03 03:50:54,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 03:50:54,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 03:50:54,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 03:50:54,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 03:50:54,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 03:50:54,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:54" (1/1) ... [2021-11-03 03:50:54,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7111abac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:54, skipping insertion in model container [2021-11-03 03:50:54,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:50:54" (1/1) ... [2021-11-03 03:50:54,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 03:50:54,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:50:54,889 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-03 03:50:55,064 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-03 03:50:55,065 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-03 03:50:55,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:50:55,084 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 03:50:55,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 03:50:55,126 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-03 03:50:55,204 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-03 03:50:55,221 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-03 03:50:55,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:50:55,230 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 03:50:55,281 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[33021,33034] [2021-11-03 03:50:55,358 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44124,44137] [2021-11-03 03:50:55,372 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test7-1.i[44245,44258] [2021-11-03 03:50:55,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 03:50:55,415 INFO L208 MainTranslator]: Completed translation [2021-11-03 03:50:55,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55 WrapperNode [2021-11-03 03:50:55,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 03:50:55,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 03:50:55,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 03:50:55,417 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 03:50:55,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 03:50:55,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 03:50:55,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 03:50:55,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 03:50:55,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 03:50:55,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 03:50:55,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 03:50:55,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 03:50:55,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (1/1) ... [2021-11-03 03:50:55,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 03:50:55,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:50:55,717 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 03:50:55,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 03:50:55,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 03:50:55,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 03:50:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 03:50:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 03:50:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 03:50:55,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 03:50:55,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 03:51:01,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 03:51:01,041 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-03 03:51:01,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:01 BoogieIcfgContainer [2021-11-03 03:51:01,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 03:51:01,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 03:51:01,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 03:51:01,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 03:51:01,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:50:54" (1/3) ... [2021-11-03 03:51:01,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e6a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:01, skipping insertion in model container [2021-11-03 03:51:01,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:50:55" (2/3) ... [2021-11-03 03:51:01,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318e6a64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:51:01, skipping insertion in model container [2021-11-03 03:51:01,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:51:01" (3/3) ... [2021-11-03 03:51:01,055 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test7-1.i [2021-11-03 03:51:01,060 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 03:51:01,060 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 530 error locations. [2021-11-03 03:51:01,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 03:51:01,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 03:51:01,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 530 error locations. [2021-11-03 03:51:01,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:51:01,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:01,161 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:51:01,161 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:01,167 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 03:51:01,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:01,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1803523091] [2021-11-03 03:51:01,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:01,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:01,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:01,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:01,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 03:51:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:01,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:01,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:01,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:01,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1803523091] [2021-11-03 03:51:01,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1803523091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:01,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:01,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:01,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878813857] [2021-11-03 03:51:01,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:51:01,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:51:01,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:01,507 INFO L87 Difference]: Start difference. First operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:03,233 INFO L93 Difference]: Finished difference Result 1045 states and 1100 transitions. [2021-11-03 03:51:03,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-03 03:51:03,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:03,255 INFO L225 Difference]: With dead ends: 1045 [2021-11-03 03:51:03,255 INFO L226 Difference]: Without dead ends: 1043 [2021-11-03 03:51:03,256 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-03 03:51:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1035. [2021-11-03 03:51:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 521 states have (on average 2.0940499040307103) internal successors, (1091), 1034 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:03,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1091 transitions. [2021-11-03 03:51:03,344 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1091 transitions. Word has length 3 [2021-11-03 03:51:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:03,344 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1091 transitions. [2021-11-03 03:51:03,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:03,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1091 transitions. [2021-11-03 03:51:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 03:51:03,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:03,345 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 03:51:03,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 03:51:03,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:03,557 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:03,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:03,557 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 03:51:03,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:03,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054588605] [2021-11-03 03:51:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:03,559 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:03,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:03,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:03,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 03:51:03,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:03,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:03,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:03,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:03,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:03,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:03,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054588605] [2021-11-03 03:51:03,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054588605] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:03,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:03,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:51:03,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497041216] [2021-11-03 03:51:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:03,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:03,782 INFO L87 Difference]: Start difference. First operand 1035 states and 1091 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:08,492 INFO L93 Difference]: Finished difference Result 1500 states and 1588 transitions. [2021-11-03 03:51:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 03:51:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:08,501 INFO L225 Difference]: With dead ends: 1500 [2021-11-03 03:51:08,501 INFO L226 Difference]: Without dead ends: 1500 [2021-11-03 03:51:08,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-03 03:51:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1070. [2021-11-03 03:51:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 565 states have (on average 2.0707964601769913) internal successors, (1170), 1069 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:08,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1170 transitions. [2021-11-03 03:51:08,540 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1170 transitions. Word has length 3 [2021-11-03 03:51:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:08,540 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1170 transitions. [2021-11-03 03:51:08,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:08,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1170 transitions. [2021-11-03 03:51:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:51:08,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:08,541 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:08,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:08,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:08,752 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:08,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 03:51:08,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:08,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168428783] [2021-11-03 03:51:08,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:08,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:08,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:08,756 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:08,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 03:51:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:08,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:08,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:08,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:08,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:08,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168428783] [2021-11-03 03:51:08,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168428783] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:08,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:08,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 03:51:08,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23144772] [2021-11-03 03:51:08,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 03:51:08,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 03:51:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:08,993 INFO L87 Difference]: Start difference. First operand 1070 states and 1170 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:10,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:10,990 INFO L93 Difference]: Finished difference Result 1400 states and 1525 transitions. [2021-11-03 03:51:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:10,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2021-11-03 03:51:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:10,999 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 03:51:10,999 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 03:51:11,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 03:51:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 03:51:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1023. [2021-11-03 03:51:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 565 states have (on average 1.9823008849557522) internal successors, (1120), 1022 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1120 transitions. [2021-11-03 03:51:11,040 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1120 transitions. Word has length 8 [2021-11-03 03:51:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:11,040 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1120 transitions. [2021-11-03 03:51:11,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1120 transitions. [2021-11-03 03:51:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 03:51:11,041 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:11,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:11,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:11,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:11,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:11,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 03:51:11,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:11,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196949618] [2021-11-03 03:51:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:11,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:11,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:11,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 03:51:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:11,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:11,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:11,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:11,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196949618] [2021-11-03 03:51:11,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196949618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:11,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:11,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 03:51:11,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576805597] [2021-11-03 03:51:11,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:11,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:11,519 INFO L87 Difference]: Start difference. First operand 1023 states and 1120 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:15,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:15,932 INFO L93 Difference]: Finished difference Result 1444 states and 1533 transitions. [2021-11-03 03:51:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 03:51:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:15,941 INFO L225 Difference]: With dead ends: 1444 [2021-11-03 03:51:15,941 INFO L226 Difference]: Without dead ends: 1444 [2021-11-03 03:51:15,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-03 03:51:15,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1013. [2021-11-03 03:51:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 565 states have (on average 1.9592920353982302) internal successors, (1107), 1012 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1107 transitions. [2021-11-03 03:51:15,966 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1107 transitions. Word has length 8 [2021-11-03 03:51:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1107 transitions. [2021-11-03 03:51:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1107 transitions. [2021-11-03 03:51:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 03:51:15,969 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:15,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:15,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:16,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:16,187 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash -945573268, now seen corresponding path program 1 times [2021-11-03 03:51:16,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:16,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [292626205] [2021-11-03 03:51:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:16,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:16,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:16,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 03:51:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:51:16,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:16,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:16,540 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:16,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [292626205] [2021-11-03 03:51:16,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [292626205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:16,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:16,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:51:16,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744348876] [2021-11-03 03:51:16,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:16,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:16,543 INFO L87 Difference]: Start difference. First operand 1013 states and 1107 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:17,233 INFO L93 Difference]: Finished difference Result 1460 states and 1586 transitions. [2021-11-03 03:51:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:51:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 03:51:17,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:17,242 INFO L225 Difference]: With dead ends: 1460 [2021-11-03 03:51:17,242 INFO L226 Difference]: Without dead ends: 1460 [2021-11-03 03:51:17,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-03 03:51:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1250. [2021-11-03 03:51:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 802 states have (on average 1.942643391521197) internal successors, (1558), 1249 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1558 transitions. [2021-11-03 03:51:17,272 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1558 transitions. Word has length 11 [2021-11-03 03:51:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:17,273 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1558 transitions. [2021-11-03 03:51:17,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:17,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1558 transitions. [2021-11-03 03:51:17,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 03:51:17,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:17,274 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:17,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:17,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:17,493 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr529ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:17,494 INFO L85 PathProgramCache]: Analyzing trace with hash 751999808, now seen corresponding path program 1 times [2021-11-03 03:51:17,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:17,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199265355] [2021-11-03 03:51:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:17,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:17,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:17,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 03:51:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:17,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:17,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:51:17,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:51:17,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 03:51:17,775 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 03:51:17,775 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 03:51:17,842 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 03:51:17,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 03:51:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:17,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:17,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:17,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199265355] [2021-11-03 03:51:17,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199265355] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:17,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:17,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:51:17,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130346814] [2021-11-03 03:51:17,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:17,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:17,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:17,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:17,944 INFO L87 Difference]: Start difference. First operand 1250 states and 1558 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 03:51:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:20,513 INFO L93 Difference]: Finished difference Result 1606 states and 1973 transitions. [2021-11-03 03:51:20,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:20,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 12 [2021-11-03 03:51:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:20,521 INFO L225 Difference]: With dead ends: 1606 [2021-11-03 03:51:20,521 INFO L226 Difference]: Without dead ends: 1606 [2021-11-03 03:51:20,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 03:51:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-03 03:51:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1249. [2021-11-03 03:51:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 801 states have (on average 1.9425717852684146) internal successors, (1556), 1248 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2021-11-03 03:51:20,553 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 12 [2021-11-03 03:51:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:20,553 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2021-11-03 03:51:20,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 03:51:20,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2021-11-03 03:51:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 03:51:20,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:20,554 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:20,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-03 03:51:20,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:20,767 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 03:51:20,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:20,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385860476] [2021-11-03 03:51:20,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:20,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:20,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:20,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 03:51:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:20,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 03:51:20,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:20,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:21,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:21,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385860476] [2021-11-03 03:51:21,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385860476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:21,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:21,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 03:51:21,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559742217] [2021-11-03 03:51:21,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:21,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:21,037 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:21,077 INFO L93 Difference]: Finished difference Result 1189 states and 1470 transitions. [2021-11-03 03:51:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 03:51:21,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 03:51:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:21,083 INFO L225 Difference]: With dead ends: 1189 [2021-11-03 03:51:21,083 INFO L226 Difference]: Without dead ends: 1189 [2021-11-03 03:51:21,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:21,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-03 03:51:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-03 03:51:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 765 states have (on average 1.9215686274509804) internal successors, (1470), 1188 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1470 transitions. [2021-11-03 03:51:21,107 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1470 transitions. Word has length 18 [2021-11-03 03:51:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:21,108 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1470 transitions. [2021-11-03 03:51:21,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1470 transitions. [2021-11-03 03:51:21,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 03:51:21,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:21,109 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:21,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:21,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:21,327 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 03:51:21,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:21,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951043223] [2021-11-03 03:51:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:21,329 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:21,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:21,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 03:51:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:21,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:21,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:21,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951043223] [2021-11-03 03:51:21,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951043223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:21,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:21,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 03:51:21,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304709564] [2021-11-03 03:51:21,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 03:51:21,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:21,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 03:51:21,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:21,625 INFO L87 Difference]: Start difference. First operand 1189 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:21,683 INFO L93 Difference]: Finished difference Result 1161 states and 1414 transitions. [2021-11-03 03:51:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:21,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 03:51:21,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:21,687 INFO L225 Difference]: With dead ends: 1161 [2021-11-03 03:51:21,687 INFO L226 Difference]: Without dead ends: 1161 [2021-11-03 03:51:21,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-03 03:51:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-11-03 03:51:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 749 states have (on average 1.8851802403204272) internal successors, (1412), 1158 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2021-11-03 03:51:21,710 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 20 [2021-11-03 03:51:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:21,710 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2021-11-03 03:51:21,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2021-11-03 03:51:21,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:51:21,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:21,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:21,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 03:51:21,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:21,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 03:51:21,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:21,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686921847] [2021-11-03 03:51:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:21,928 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:21,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:21,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 03:51:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:22,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:22,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:22,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:22,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:22,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686921847] [2021-11-03 03:51:22,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686921847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:22,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:22,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 03:51:22,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204910743] [2021-11-03 03:51:22,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:22,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:22,403 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:24,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:24,330 INFO L93 Difference]: Finished difference Result 1622 states and 1995 transitions. [2021-11-03 03:51:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 03:51:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-11-03 03:51:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:24,337 INFO L225 Difference]: With dead ends: 1622 [2021-11-03 03:51:24,337 INFO L226 Difference]: Without dead ends: 1622 [2021-11-03 03:51:24,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-03 03:51:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1155. [2021-11-03 03:51:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 749 states have (on average 1.8744993324432577) internal successors, (1404), 1154 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:24,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1404 transitions. [2021-11-03 03:51:24,361 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1404 transitions. Word has length 34 [2021-11-03 03:51:24,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:24,361 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1404 transitions. [2021-11-03 03:51:24,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:24,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1404 transitions. [2021-11-03 03:51:24,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 03:51:24,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:24,363 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:24,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:24,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:24,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 03:51:24,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:24,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329458302] [2021-11-03 03:51:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:24,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:24,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:24,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:24,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 03:51:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:51:24,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:25,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:25,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:25,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329458302] [2021-11-03 03:51:25,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329458302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:25,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:25,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:51:25,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104104719] [2021-11-03 03:51:25,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:25,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:25,621 INFO L87 Difference]: Start difference. First operand 1155 states and 1404 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:31,410 INFO L93 Difference]: Finished difference Result 1755 states and 2150 transitions. [2021-11-03 03:51:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:51:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-03 03:51:31,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:31,417 INFO L225 Difference]: With dead ends: 1755 [2021-11-03 03:51:31,417 INFO L226 Difference]: Without dead ends: 1755 [2021-11-03 03:51:31,418 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:51:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-11-03 03:51:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1151. [2021-11-03 03:51:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 749 states have (on average 1.863818424566088) internal successors, (1396), 1150 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1396 transitions. [2021-11-03 03:51:31,441 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1396 transitions. Word has length 34 [2021-11-03 03:51:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:31,441 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1396 transitions. [2021-11-03 03:51:31,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1396 transitions. [2021-11-03 03:51:31,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 03:51:31,444 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:31,444 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:31,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:31,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:31,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:31,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 03:51:31,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:31,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1806367657] [2021-11-03 03:51:31,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:31,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:31,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:31,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:31,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 03:51:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:31,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:51:31,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:32,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:32,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1806367657] [2021-11-03 03:51:32,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1806367657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:32,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:32,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 03:51:32,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108152114] [2021-11-03 03:51:32,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 03:51:32,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:32,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 03:51:32,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 03:51:32,251 INFO L87 Difference]: Start difference. First operand 1151 states and 1396 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:32,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:32,306 INFO L93 Difference]: Finished difference Result 1139 states and 1376 transitions. [2021-11-03 03:51:32,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 03:51:32,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 03:51:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:32,312 INFO L225 Difference]: With dead ends: 1139 [2021-11-03 03:51:32,312 INFO L226 Difference]: Without dead ends: 1139 [2021-11-03 03:51:32,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 03:51:32,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-03 03:51:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-11-03 03:51:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 737 states have (on average 1.8670284938941655) internal successors, (1376), 1138 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1376 transitions. [2021-11-03 03:51:32,334 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1376 transitions. Word has length 52 [2021-11-03 03:51:32,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:32,334 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1376 transitions. [2021-11-03 03:51:32,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1376 transitions. [2021-11-03 03:51:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 03:51:32,338 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:32,338 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:32,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:32,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:32,551 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:32,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:32,552 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 03:51:32,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:32,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754728232] [2021-11-03 03:51:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:32,554 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:32,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:32,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 03:51:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:33,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 03:51:33,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:33,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:33,832 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 03:51:33,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-03 03:51:33,853 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 03:51:33,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-03 03:51:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:33,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:39,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:39,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754728232] [2021-11-03 03:51:39,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754728232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:39,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:39,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 03:51:39,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418875982] [2021-11-03 03:51:39,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:39,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:39,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:39,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 03:51:39,174 INFO L87 Difference]: Start difference. First operand 1139 states and 1376 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:51:55,113 INFO L93 Difference]: Finished difference Result 2090 states and 2635 transitions. [2021-11-03 03:51:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 03:51:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 03:51:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:51:55,122 INFO L225 Difference]: With dead ends: 2090 [2021-11-03 03:51:55,122 INFO L226 Difference]: Without dead ends: 2090 [2021-11-03 03:51:55,123 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 03:51:55,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-03 03:51:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1101. [2021-11-03 03:51:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 737 states have (on average 1.8154681139755766) internal successors, (1338), 1100 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1338 transitions. [2021-11-03 03:51:55,145 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1338 transitions. Word has length 60 [2021-11-03 03:51:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:51:55,146 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1338 transitions. [2021-11-03 03:51:55,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:51:55,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1338 transitions. [2021-11-03 03:51:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 03:51:55,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:51:55,147 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:51:55,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 03:51:55,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:51:55,362 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:51:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:51:55,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 03:51:55,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:51:55,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775714432] [2021-11-03 03:51:55,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:51:55,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:51:55,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:51:55,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:51:55,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 03:51:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:51:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:51:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:51:55,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:51:55,891 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 22 treesize of output 18 [2021-11-03 03:51:55,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 03:51:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:56,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:51:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:51:56,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:51:56,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775714432] [2021-11-03 03:51:56,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775714432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:51:56,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:51:56,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 03:51:56,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902608699] [2021-11-03 03:51:56,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:51:56,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:51:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:51:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:51:56,182 INFO L87 Difference]: Start difference. First operand 1101 states and 1338 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:01,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:01,823 INFO L93 Difference]: Finished difference Result 1761 states and 2127 transitions. [2021-11-03 03:52:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 03:52:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 03:52:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:01,833 INFO L225 Difference]: With dead ends: 1761 [2021-11-03 03:52:01,833 INFO L226 Difference]: Without dead ends: 1761 [2021-11-03 03:52:01,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 03:52:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-11-03 03:52:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1100. [2021-11-03 03:52:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 737 states have (on average 1.814111261872456) internal successors, (1337), 1099 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1337 transitions. [2021-11-03 03:52:01,854 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1337 transitions. Word has length 66 [2021-11-03 03:52:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:01,856 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1337 transitions. [2021-11-03 03:52:01,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1337 transitions. [2021-11-03 03:52:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 03:52:01,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:01,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:01,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:02,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:02,072 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:52:02,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:02,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 03:52:02,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:02,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427199141] [2021-11-03 03:52:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:02,073 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:02,074 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:02,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 03:52:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:02,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 03:52:02,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:02,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 03:52:02,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 03:52:02,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 03:52:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 03:52:02,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 03:52:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:02,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:03,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:03,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427199141] [2021-11-03 03:52:03,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427199141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:03,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:03,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 03:52:03,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991660121] [2021-11-03 03:52:03,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:52:03,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:03,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:52:03,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:52:03,385 INFO L87 Difference]: Start difference. First operand 1100 states and 1337 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:20,717 INFO L93 Difference]: Finished difference Result 1691 states and 2079 transitions. [2021-11-03 03:52:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 03:52:20,719 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-03 03:52:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:20,725 INFO L225 Difference]: With dead ends: 1691 [2021-11-03 03:52:20,725 INFO L226 Difference]: Without dead ends: 1691 [2021-11-03 03:52:20,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 03:52:20,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-03 03:52:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1099. [2021-11-03 03:52:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 737 states have (on average 1.812754409769335) internal successors, (1336), 1098 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:20,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1336 transitions. [2021-11-03 03:52:20,742 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1336 transitions. Word has length 67 [2021-11-03 03:52:20,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:20,742 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1336 transitions. [2021-11-03 03:52:20,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:20,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1336 transitions. [2021-11-03 03:52:20,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 03:52:20,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:20,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:20,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 03:52:20,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:20,964 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:52:20,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:20,964 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 03:52:20,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:20,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383840013] [2021-11-03 03:52:20,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:20,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:20,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:20,967 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:20,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 03:52:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 03:52:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:21,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:21,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:21,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383840013] [2021-11-03 03:52:21,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383840013] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 03:52:21,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 03:52:21,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 03:52:21,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348364996] [2021-11-03 03:52:21,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 03:52:21,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:21,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 03:52:21,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 03:52:21,739 INFO L87 Difference]: Start difference. First operand 1099 states and 1336 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:21,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:21,890 INFO L93 Difference]: Finished difference Result 1849 states and 2273 transitions. [2021-11-03 03:52:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 03:52:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 03:52:21,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:21,898 INFO L225 Difference]: With dead ends: 1849 [2021-11-03 03:52:21,898 INFO L226 Difference]: Without dead ends: 1849 [2021-11-03 03:52:21,898 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 03:52:21,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-11-03 03:52:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1102. [2021-11-03 03:52:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 740 states have (on average 1.8094594594594595) internal successors, (1339), 1101 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1339 transitions. [2021-11-03 03:52:21,917 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1339 transitions. Word has length 71 [2021-11-03 03:52:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:21,918 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1339 transitions. [2021-11-03 03:52:21,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1339 transitions. [2021-11-03 03:52:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 03:52:21,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:21,919 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:21,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:22,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:22,134 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:52:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:22,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 03:52:22,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:22,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019370415] [2021-11-03 03:52:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:22,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:22,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:22,140 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:22,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 03:52:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:52:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:22,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:23,189 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:23,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019370415] [2021-11-03 03:52:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019370415] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:52:23,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1313187698] [2021-11-03 03:52:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:23,190 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:52:23,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:52:23,191 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:52:23,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 03:52:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:52:23,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:24,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1313187698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:52:24,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066194721] [2021-11-03 03:52:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 03:52:24,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:52:24,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:52:24,258 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:52:24,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 03:52:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 03:52:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 03:52:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:25,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:25,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066194721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:52:25,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:52:25,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 03:52:25,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363420792] [2021-11-03 03:52:25,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 03:52:25,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:52:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 03:52:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 03:52:25,259 INFO L87 Difference]: Start difference. First operand 1102 states and 1339 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 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) [2021-11-03 03:52:25,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:52:25,811 INFO L93 Difference]: Finished difference Result 1855 states and 2279 transitions. [2021-11-03 03:52:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 03:52:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 03:52:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:52:25,820 INFO L225 Difference]: With dead ends: 1855 [2021-11-03 03:52:25,820 INFO L226 Difference]: Without dead ends: 1855 [2021-11-03 03:52:25,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 03:52:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-03 03:52:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1108. [2021-11-03 03:52:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 746 states have (on average 1.8029490616621984) internal successors, (1345), 1107 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:52:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1345 transitions. [2021-11-03 03:52:25,847 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1345 transitions. Word has length 73 [2021-11-03 03:52:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:52:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1345 transitions. [2021-11-03 03:52:25,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 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) [2021-11-03 03:52:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1345 transitions. [2021-11-03 03:52:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 03:52:25,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:52:25,850 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:52:25,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 03:52:26,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-03 03:52:26,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-03 03:52:26,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 03:52:26,451 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:52:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:52:26,451 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 03:52:26,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:52:26,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367652765] [2021-11-03 03:52:26,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:52:26,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:52:26,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:52:26,453 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:52:26,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 03:52:27,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:52:27,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:52:27,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:52:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:27,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:28,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:52:28,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367652765] [2021-11-03 03:52:28,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367652765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:52:28,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685885621] [2021-11-03 03:52:28,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:52:28,131 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:52:28,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:52:28,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:52:28,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 03:52:29,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:52:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:52:29,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:52:29,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:52:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:29,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:52:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:52:29,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1685885621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:52:29,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804571556] [2021-11-03 03:52:29,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 03:52:29,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:52:29,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:52:29,995 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:52:29,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 03:53:08,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 03:53:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 03:53:08,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:08,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:09,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804571556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:09,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 03:53:09,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 03:53:09,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069270403] [2021-11-03 03:53:09,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 03:53:09,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 03:53:09,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 03:53:09,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 03:53:09,163 INFO L87 Difference]: Start difference. First operand 1108 states and 1345 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2021-11-03 03:53:11,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 03:53:11,523 INFO L93 Difference]: Finished difference Result 1867 states and 2291 transitions. [2021-11-03 03:53:11,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 03:53:11,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) Word has length 77 [2021-11-03 03:53:11,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 03:53:11,531 INFO L225 Difference]: With dead ends: 1867 [2021-11-03 03:53:11,531 INFO L226 Difference]: Without dead ends: 1867 [2021-11-03 03:53:11,531 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 03:53:11,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-11-03 03:53:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1120. [2021-11-03 03:53:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 758 states have (on average 1.7902374670184698) internal successors, (1357), 1119 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 03:53:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1357 transitions. [2021-11-03 03:53:11,548 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1357 transitions. Word has length 77 [2021-11-03 03:53:11,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 03:53:11,548 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1357 transitions. [2021-11-03 03:53:11,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 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) [2021-11-03 03:53:11,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1357 transitions. [2021-11-03 03:53:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 03:53:11,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 03:53:11,550 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 03:53:11,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:11,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 03:53:11,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 03:53:12,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:12,161 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 03:53:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 03:53:12,162 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-03 03:53:12,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 03:53:12,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548451573] [2021-11-03 03:53:12,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:12,162 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 03:53:12,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 03:53:12,164 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 03:53:12,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 03:53:13,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:53:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 03:53:13,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:14,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:15,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 03:53:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548451573] [2021-11-03 03:53:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548451573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:15,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941114768] [2021-11-03 03:53:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:15,532 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 03:53:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 03:53:15,533 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 03:53:15,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 03:53:18,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 03:53:18,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 03:53:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 03:53:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 03:53:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:18,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 03:53:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 03:53:21,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941114768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 03:53:21,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068145449] [2021-11-03 03:53:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 03:53:21,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 03:53:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 03:53:21,900 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 03:53:21,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8422d559-d38a-4252-82df-010c2ecf8181/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process