./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b879d991ca85089954916015c9838d386a5c85365dad0e09e537aeb772eaaaf8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:19,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:19,492 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:19,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:19,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:19,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:19,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:19,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:19,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:19,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:19,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:19,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:19,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:19,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:19,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:19,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:19,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:19,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:19,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:19,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:19,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:19,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:19,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:19,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:19,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:19,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:19,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:19,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:19,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:19,572 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:19,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:19,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:19,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:19,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:19,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:19,576 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:19,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:19,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:19,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:19,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:19,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:19,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:52:19,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:19,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:19,638 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:19,638 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:19,638 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:19,638 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:19,638 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:52:19,638 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:19,639 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:19,639 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:52:19,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:52:19,639 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:19,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:52:19,640 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:52:19,640 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:52:19,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:52:19,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:52:19,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:19,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:19,641 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:52:19,641 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:52:19,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:19,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:19,643 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:19,643 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:19,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:19,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:19,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:19,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:19,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:19,644 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:52:19,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:52:19,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:19,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:19,645 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879d991ca85089954916015c9838d386a5c85365dad0e09e537aeb772eaaaf8 [2021-11-07 01:52:19,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:19,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:19,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:19,960 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:19,961 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:19,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i [2021-11-07 01:52:20,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/9b921366b/68c3691753894a45bd14ecf88d426f95/FLAG83b490101 [2021-11-07 01:52:20,690 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:20,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i [2021-11-07 01:52:20,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/9b921366b/68c3691753894a45bd14ecf88d426f95/FLAG83b490101 [2021-11-07 01:52:20,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/9b921366b/68c3691753894a45bd14ecf88d426f95 [2021-11-07 01:52:20,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:20,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:20,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:20,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:20,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:20,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,895 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47c1c930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:20, skipping insertion in model container [2021-11-07 01:52:20,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:20" (1/1) ... [2021-11-07 01:52:20,903 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:20,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:21,493 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[37019,37032] [2021-11-07 01:52:21,591 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[47352,47365] [2021-11-07 01:52:21,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:21,618 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:52:21,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@f7acf25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:21, skipping insertion in model container [2021-11-07 01:52:21,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:21,620 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:52:21,622 INFO L168 Benchmark]: Toolchain (without parser) took 732.38 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 64.1 MB in the beginning and 83.7 MB in the end (delta: -19.7 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:21,623 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:52:21,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.96 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 63.8 MB in the beginning and 83.7 MB in the end (delta: -19.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:52:21,627 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 86.0 MB. Free memory was 64.7 MB in the beginning and 64.7 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 729.96 ms. Allocated memory was 86.0 MB in the beginning and 117.4 MB in the end (delta: 31.5 MB). Free memory was 63.8 MB in the beginning and 83.7 MB in the end (delta: -19.9 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 815]: 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b879d991ca85089954916015c9838d386a5c85365dad0e09e537aeb772eaaaf8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:52:24,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:52:24,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:52:24,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:52:24,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:52:24,113 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:52:24,115 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:52:24,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:52:24,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:52:24,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:52:24,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:52:24,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:52:24,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:52:24,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:52:24,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:52:24,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:52:24,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:52:24,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:52:24,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:52:24,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:52:24,171 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:52:24,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:52:24,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:52:24,178 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:52:24,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:52:24,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:52:24,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:52:24,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:52:24,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:52:24,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:52:24,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:52:24,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:52:24,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:52:24,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:52:24,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:52:24,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:52:24,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:52:24,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:52:24,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:52:24,207 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:52:24,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:52:24,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:52:24,270 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:52:24,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:52:24,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:52:24,272 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:52:24,272 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:52:24,272 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:52:24,273 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:52:24,273 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:52:24,273 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:52:24,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:52:24,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:52:24,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:52:24,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:52:24,277 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:52:24,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:52:24,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:52:24,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:52:24,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:52:24,278 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:52:24,278 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:52:24,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:52:24,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:52:24,279 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:52:24,279 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:52:24,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:52:24,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:52:24,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:52:24,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:52:24,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:52:24,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:24,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:52:24,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:52:24,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:52:24,282 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:24,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:52:24,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:52:24,282 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b879d991ca85089954916015c9838d386a5c85365dad0e09e537aeb772eaaaf8 [2021-11-07 01:52:24,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:52:24,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:52:24,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:52:24,770 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:52:24,770 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:52:24,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i [2021-11-07 01:52:24,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/cb97af919/ea34ae8d20844804a08b858f5bc4d976/FLAGb01df2788 [2021-11-07 01:52:25,685 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:52:25,689 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i [2021-11-07 01:52:25,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/cb97af919/ea34ae8d20844804a08b858f5bc4d976/FLAGb01df2788 [2021-11-07 01:52:25,869 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/data/cb97af919/ea34ae8d20844804a08b858f5bc4d976 [2021-11-07 01:52:25,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:52:25,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:52:25,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:25,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:52:25,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:52:25,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:25" (1/1) ... [2021-11-07 01:52:25,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2739c039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:25, skipping insertion in model container [2021-11-07 01:52:25,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:52:25" (1/1) ... [2021-11-07 01:52:25,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:52:25,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:26,471 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[37019,37032] [2021-11-07 01:52:26,610 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[47352,47365] [2021-11-07 01:52:26,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:26,666 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:52:26,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:52:26,770 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[37019,37032] [2021-11-07 01:52:26,876 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[47352,47365] [2021-11-07 01:52:26,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:26,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:52:26,973 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[37019,37032] [2021-11-07 01:52:27,032 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_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test2-2.i[47352,47365] [2021-11-07 01:52:27,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:52:27,102 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:52:27,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27 WrapperNode [2021-11-07 01:52:27,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:52:27,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:27,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:52:27,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:52:27,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:52:27,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:52:27,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:52:27,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:52:27,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,312 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:52:27,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:52:27,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:52:27,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:52:27,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (1/1) ... [2021-11-07 01:52:27,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:52:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:27,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:52:27,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:52:27,517 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:52:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:52:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:52:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:52:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:52:27,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:52:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:52:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:52:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:52:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:52:27,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:52:27,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:52:33,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:52:33,939 INFO L299 CfgBuilder]: Removed 85 assume(true) statements. [2021-11-07 01:52:33,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:52:33 BoogieIcfgContainer [2021-11-07 01:52:33,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:52:33,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:52:33,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:52:33,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:52:33,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:52:25" (1/3) ... [2021-11-07 01:52:33,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d47ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:52:33, skipping insertion in model container [2021-11-07 01:52:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:52:27" (2/3) ... [2021-11-07 01:52:33,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d47ce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:52:33, skipping insertion in model container [2021-11-07 01:52:33,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:52:33" (3/3) ... [2021-11-07 01:52:33,958 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test2-2.i [2021-11-07 01:52:33,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:52:33,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 540 error locations. [2021-11-07 01:52:34,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:52:34,055 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:52:34,055 INFO L340 AbstractCegarLoop]: Starting to check reachability of 540 error locations. [2021-11-07 01:52:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:52:34,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:34,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:52:34,117 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:34,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 01:52:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:34,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904664942] [2021-11-07 01:52:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:34,178 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:34,182 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:34,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:52:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:34,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:34,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:34,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:34,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904664942] [2021-11-07 01:52:34,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904664942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:34,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:34,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:52:34,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839791046] [2021-11-07 01:52:34,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:52:34,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:34,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:52:34,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:52:34,537 INFO L87 Difference]: Start difference. First operand has 1089 states, 548 states have (on average 2.2354014598540144) internal successors, (1225), 1088 states have internal predecessors, (1225), 0 states have call successors, (0), 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) [2021-11-07 01:52:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:37,285 INFO L93 Difference]: Finished difference Result 1253 states and 1325 transitions. [2021-11-07 01:52:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:37,286 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 [2021-11-07 01:52:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:37,321 INFO L225 Difference]: With dead ends: 1253 [2021-11-07 01:52:37,321 INFO L226 Difference]: Without dead ends: 1251 [2021-11-07 01:52:37,322 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 [2021-11-07 01:52:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-07 01:52:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1073. [2021-11-07 01:52:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 548 states have (on average 2.0748175182481754) internal successors, (1137), 1072 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1137 transitions. [2021-11-07 01:52:37,437 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1137 transitions. Word has length 3 [2021-11-07 01:52:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:37,438 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 1137 transitions. [2021-11-07 01:52:37,438 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) [2021-11-07 01:52:37,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1137 transitions. [2021-11-07 01:52:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:52:37,439 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:37,439 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:52:37,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:37,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:37,653 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:37,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:37,654 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 01:52:37,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:37,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302790257] [2021-11-07 01:52:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:37,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:37,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:37,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:52:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:37,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:37,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:38,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:38,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302790257] [2021-11-07 01:52:38,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302790257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:38,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:38,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:52:38,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361567832] [2021-11-07 01:52:38,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:38,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:38,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:38,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:38,015 INFO L87 Difference]: Start difference. First operand 1073 states and 1137 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) [2021-11-07 01:52:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:43,338 INFO L93 Difference]: Finished difference Result 1576 states and 1680 transitions. [2021-11-07 01:52:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:43,339 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 [2021-11-07 01:52:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:43,348 INFO L225 Difference]: With dead ends: 1576 [2021-11-07 01:52:43,348 INFO L226 Difference]: Without dead ends: 1576 [2021-11-07 01:52:43,349 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 [2021-11-07 01:52:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-11-07 01:52:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1108. [2021-11-07 01:52:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 592 states have (on average 2.054054054054054) internal successors, (1216), 1107 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1216 transitions. [2021-11-07 01:52:43,383 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1216 transitions. Word has length 3 [2021-11-07 01:52:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:43,384 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1216 transitions. [2021-11-07 01:52:43,384 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) [2021-11-07 01:52:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1216 transitions. [2021-11-07 01:52:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:52:43,385 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:43,385 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:43,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:43,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:43,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:43,597 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 01:52:43,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:43,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119269621] [2021-11-07 01:52:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:43,599 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:43,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:43,600 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:43,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:52:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:43,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:43,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119269621] [2021-11-07 01:52:43,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119269621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:43,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:43,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:52:43,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39989338] [2021-11-07 01:52:43,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:52:43,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:52:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:52:43,841 INFO L87 Difference]: Start difference. First operand 1108 states and 1216 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) [2021-11-07 01:52:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:45,711 INFO L93 Difference]: Finished difference Result 1295 states and 1425 transitions. [2021-11-07 01:52:45,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:45,713 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 [2021-11-07 01:52:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:45,720 INFO L225 Difference]: With dead ends: 1295 [2021-11-07 01:52:45,720 INFO L226 Difference]: Without dead ends: 1295 [2021-11-07 01:52:45,721 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 [2021-11-07 01:52:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2021-11-07 01:52:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1061. [2021-11-07 01:52:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 592 states have (on average 1.9695945945945945) internal successors, (1166), 1060 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1166 transitions. [2021-11-07 01:52:45,771 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1166 transitions. Word has length 8 [2021-11-07 01:52:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:45,771 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 1166 transitions. [2021-11-07 01:52:45,772 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) [2021-11-07 01:52:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1166 transitions. [2021-11-07 01:52:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:52:45,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:45,775 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:45,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:45,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:45,986 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:45,987 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 01:52:45,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:45,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763448300] [2021-11-07 01:52:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:45,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:45,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:45,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:52:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:46,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:46,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:46,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:46,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:46,276 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:46,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763448300] [2021-11-07 01:52:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763448300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:46,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:46,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:52:46,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144944588] [2021-11-07 01:52:46,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:46,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:46,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:46,279 INFO L87 Difference]: Start difference. First operand 1061 states and 1166 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) [2021-11-07 01:52:51,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:51,212 INFO L93 Difference]: Finished difference Result 1325 states and 1419 transitions. [2021-11-07 01:52:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:51,213 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 [2021-11-07 01:52:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:51,222 INFO L225 Difference]: With dead ends: 1325 [2021-11-07 01:52:51,223 INFO L226 Difference]: Without dead ends: 1325 [2021-11-07 01:52:51,223 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 [2021-11-07 01:52:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-11-07 01:52:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1051. [2021-11-07 01:52:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 592 states have (on average 1.947635135135135) internal successors, (1153), 1050 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1153 transitions. [2021-11-07 01:52:51,249 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1153 transitions. Word has length 8 [2021-11-07 01:52:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:51,249 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1153 transitions. [2021-11-07 01:52:51,250 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) [2021-11-07 01:52:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1153 transitions. [2021-11-07 01:52:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:52:51,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:51,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:51,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 01:52:51,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:51,462 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr434REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:51,462 INFO L85 PathProgramCache]: Analyzing trace with hash -945756139, now seen corresponding path program 1 times [2021-11-07 01:52:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:51,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469990399] [2021-11-07 01:52:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:51,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:51,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:51,467 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:51,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:52:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:51,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:51,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:51,803 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:51,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469990399] [2021-11-07 01:52:51,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469990399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:51,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:51,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:52:51,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347830848] [2021-11-07 01:52:51,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:52:51,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:51,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:52:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:52:51,806 INFO L87 Difference]: Start difference. First operand 1051 states and 1153 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-07 01:52:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:52,164 INFO L93 Difference]: Finished difference Result 1534 states and 1675 transitions. [2021-11-07 01:52:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2021-11-07 01:52:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:52,174 INFO L225 Difference]: With dead ends: 1534 [2021-11-07 01:52:52,174 INFO L226 Difference]: Without dead ends: 1534 [2021-11-07 01:52:52,175 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:52:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-11-07 01:52:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1231. [2021-11-07 01:52:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 772 states have (on average 1.8976683937823835) internal successors, (1465), 1230 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1465 transitions. [2021-11-07 01:52:52,209 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1465 transitions. Word has length 11 [2021-11-07 01:52:52,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:52,210 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 1465 transitions. [2021-11-07 01:52:52,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-07 01:52:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1465 transitions. [2021-11-07 01:52:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:52:52,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:52,211 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:52,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:52,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,424 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:52,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-07 01:52:52,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:52,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448940795] [2021-11-07 01:52:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:52,426 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:52,427 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:52,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:52:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:52,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:52,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:52,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:52,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448940795] [2021-11-07 01:52:52,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448940795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:52,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:52,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:52:52,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711887991] [2021-11-07 01:52:52,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:52,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:52,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:52,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:52,673 INFO L87 Difference]: Start difference. First operand 1231 states and 1465 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:52,710 INFO L93 Difference]: Finished difference Result 1385 states and 1605 transitions. [2021-11-07 01:52:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-07 01:52:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:52,719 INFO L225 Difference]: With dead ends: 1385 [2021-11-07 01:52:52,719 INFO L226 Difference]: Without dead ends: 1385 [2021-11-07 01:52:52,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-11-07 01:52:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1171. [2021-11-07 01:52:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 736 states have (on average 1.8736413043478262) internal successors, (1379), 1170 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1379 transitions. [2021-11-07 01:52:52,760 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1379 transitions. Word has length 13 [2021-11-07 01:52:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:52,760 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 1379 transitions. [2021-11-07 01:52:52,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1379 transitions. [2021-11-07 01:52:52,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 01:52:52,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:52,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:52,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:52,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,980 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr539ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:52,981 INFO L85 PathProgramCache]: Analyzing trace with hash -28488695, now seen corresponding path program 1 times [2021-11-07 01:52:52,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:52,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650263260] [2021-11-07 01:52:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:52,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:52,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:52,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:52,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:52:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:53,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:53,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:53,255 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:52:53,256 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 [2021-11-07 01:52:53,325 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:52:53,325 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 [2021-11-07 01:52:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:53,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:53,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:53,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650263260] [2021-11-07 01:52:53,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650263260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:53,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:53,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:52:53,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665695730] [2021-11-07 01:52:53,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:53,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:53,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:53,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:53,444 INFO L87 Difference]: Start difference. First operand 1171 states and 1379 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:55,708 INFO L93 Difference]: Finished difference Result 1518 states and 1772 transitions. [2021-11-07 01:52:55,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:55,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 01:52:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:55,717 INFO L225 Difference]: With dead ends: 1518 [2021-11-07 01:52:55,717 INFO L226 Difference]: Without dead ends: 1518 [2021-11-07 01:52:55,718 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:52:55,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-11-07 01:52:55,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1170. [2021-11-07 01:52:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 735 states have (on average 1.873469387755102) internal successors, (1377), 1169 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1377 transitions. [2021-11-07 01:52:55,746 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1377 transitions. Word has length 14 [2021-11-07 01:52:55,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:55,747 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1377 transitions. [2021-11-07 01:52:55,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:55,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1377 transitions. [2021-11-07 01:52:55,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 01:52:55,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:55,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:55,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:52:55,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,962 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-07 01:52:55,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:55,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635102552] [2021-11-07 01:52:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:55,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:55,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:55,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:55,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:52:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:52:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:56,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:56,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:56,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635102552] [2021-11-07 01:52:56,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635102552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:56,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:56,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:52:56,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140189394] [2021-11-07 01:52:56,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:56,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:56,281 INFO L87 Difference]: Start difference. First operand 1170 states and 1377 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:56,314 INFO L93 Difference]: Finished difference Result 1110 states and 1291 transitions. [2021-11-07 01:52:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:52:56,314 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 [2021-11-07 01:52:56,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:56,320 INFO L225 Difference]: With dead ends: 1110 [2021-11-07 01:52:56,320 INFO L226 Difference]: Without dead ends: 1110 [2021-11-07 01:52:56,321 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 [2021-11-07 01:52:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-11-07 01:52:56,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2021-11-07 01:52:56,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 699 states have (on average 1.8469241773962803) internal successors, (1291), 1109 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:56,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1291 transitions. [2021-11-07 01:52:56,344 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1291 transitions. Word has length 18 [2021-11-07 01:52:56,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:56,345 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1291 transitions. [2021-11-07 01:52:56,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1291 transitions. [2021-11-07 01:52:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:52:56,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:56,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:56,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:56,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:56,560 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-07 01:52:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360952723] [2021-11-07 01:52:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:56,563 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:56,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:52:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:56,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:56,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:56,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:56,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360952723] [2021-11-07 01:52:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360952723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:56,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:56,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:52:56,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101029720] [2021-11-07 01:52:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:52:56,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:52:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:52:56,891 INFO L87 Difference]: Start difference. First operand 1110 states and 1291 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) [2021-11-07 01:52:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:56,986 INFO L93 Difference]: Finished difference Result 1082 states and 1235 transitions. [2021-11-07 01:52:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:52:56,987 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 [2021-11-07 01:52:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:56,993 INFO L225 Difference]: With dead ends: 1082 [2021-11-07 01:52:56,993 INFO L226 Difference]: Without dead ends: 1082 [2021-11-07 01:52:56,993 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 [2021-11-07 01:52:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-07 01:52:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2021-11-07 01:52:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 683 states have (on average 1.8052708638360175) internal successors, (1233), 1079 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1233 transitions. [2021-11-07 01:52:57,016 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1233 transitions. Word has length 20 [2021-11-07 01:52:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:57,017 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1233 transitions. [2021-11-07 01:52:57,017 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) [2021-11-07 01:52:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1233 transitions. [2021-11-07 01:52:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:52:57,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:57,019 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] [2021-11-07 01:52:57,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:57,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:57,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:52:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-07 01:52:57,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:57,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091968950] [2021-11-07 01:52:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:57,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:57,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:57,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:52:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:57,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:52:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:57,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:57,781 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:57,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091968950] [2021-11-07 01:52:57,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091968950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:57,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:57,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:52:57,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534664963] [2021-11-07 01:52:57,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:52:57,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:52:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:52:57,786 INFO L87 Difference]: Start difference. First operand 1080 states and 1233 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) [2021-11-07 01:53:00,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:00,099 INFO L93 Difference]: Finished difference Result 1543 states and 1775 transitions. [2021-11-07 01:53:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:53:00,100 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 [2021-11-07 01:53:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:00,107 INFO L225 Difference]: With dead ends: 1543 [2021-11-07 01:53:00,107 INFO L226 Difference]: Without dead ends: 1543 [2021-11-07 01:53:00,107 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 [2021-11-07 01:53:00,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-11-07 01:53:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1076. [2021-11-07 01:53:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 683 states have (on average 1.7935578330893118) internal successors, (1225), 1075 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1225 transitions. [2021-11-07 01:53:00,135 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1225 transitions. Word has length 34 [2021-11-07 01:53:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:00,136 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 1225 transitions. [2021-11-07 01:53:00,136 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) [2021-11-07 01:53:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1225 transitions. [2021-11-07 01:53:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:53:00,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:00,138 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] [2021-11-07 01:53:00,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 01:53:00,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:00,365 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-07 01:53:00,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:00,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998775067] [2021-11-07 01:53:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:00,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:00,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:00,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:00,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:53:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:00,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:00,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:00,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:01,501 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:01,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998775067] [2021-11-07 01:53:01,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998775067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:01,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:53:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133356848] [2021-11-07 01:53:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:01,503 INFO L87 Difference]: Start difference. First operand 1076 states and 1225 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) [2021-11-07 01:53:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:08,847 INFO L93 Difference]: Finished difference Result 1597 states and 1792 transitions. [2021-11-07 01:53:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:53:08,847 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 [2021-11-07 01:53:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:08,856 INFO L225 Difference]: With dead ends: 1597 [2021-11-07 01:53:08,856 INFO L226 Difference]: Without dead ends: 1597 [2021-11-07 01:53:08,857 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 [2021-11-07 01:53:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-11-07 01:53:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1072. [2021-11-07 01:53:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 683 states have (on average 1.7818448023426061) internal successors, (1217), 1071 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1217 transitions. [2021-11-07 01:53:08,883 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1217 transitions. Word has length 34 [2021-11-07 01:53:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:08,883 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1217 transitions. [2021-11-07 01:53:08,884 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) [2021-11-07 01:53:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1217 transitions. [2021-11-07 01:53:08,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:53:08,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:08,886 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:08,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 01:53:09,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:09,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-07 01:53:09,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:09,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613623941] [2021-11-07 01:53:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:09,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:09,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:09,102 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:09,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:53:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:53:09,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:09,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:09,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613623941] [2021-11-07 01:53:09,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613623941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:09,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:09,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:53:09,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218623260] [2021-11-07 01:53:09,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:53:09,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:53:09,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:53:09,760 INFO L87 Difference]: Start difference. First operand 1072 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:09,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:09,829 INFO L93 Difference]: Finished difference Result 1060 states and 1197 transitions. [2021-11-07 01:53:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:53:09,830 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 [2021-11-07 01:53:09,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:09,836 INFO L225 Difference]: With dead ends: 1060 [2021-11-07 01:53:09,836 INFO L226 Difference]: Without dead ends: 1060 [2021-11-07 01:53:09,837 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 [2021-11-07 01:53:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-11-07 01:53:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1060. [2021-11-07 01:53:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 671 states have (on average 1.7839046199701938) internal successors, (1197), 1059 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1197 transitions. [2021-11-07 01:53:09,857 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1197 transitions. Word has length 52 [2021-11-07 01:53:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:09,858 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 1197 transitions. [2021-11-07 01:53:09,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:09,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1197 transitions. [2021-11-07 01:53:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:53:09,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:09,861 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] [2021-11-07 01:53:09,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:10,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:10,076 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-07 01:53:10,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:10,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123344708] [2021-11-07 01:53:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:10,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:10,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:10,078 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:53:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:53:10,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:10,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:11,400 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:53:11,400 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 29 treesize of output 31 [2021-11-07 01:53:11,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:53:11,408 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 28 treesize of output 24 [2021-11-07 01:53:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:11,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:19,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:19,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123344708] [2021-11-07 01:53:19,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123344708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:19,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:19,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:53:19,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628792374] [2021-11-07 01:53:19,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:19,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=15, Unknown=2, NotChecked=0, Total=30 [2021-11-07 01:53:19,018 INFO L87 Difference]: Start difference. First operand 1060 states and 1197 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) [2021-11-07 01:53:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:32,906 INFO L93 Difference]: Finished difference Result 1293 states and 1503 transitions. [2021-11-07 01:53:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:53:32,909 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 [2021-11-07 01:53:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:32,914 INFO L225 Difference]: With dead ends: 1293 [2021-11-07 01:53:32,914 INFO L226 Difference]: Without dead ends: 1293 [2021-11-07 01:53:32,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26, Invalid=27, Unknown=3, NotChecked=0, Total=56 [2021-11-07 01:53:32,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2021-11-07 01:53:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1022. [2021-11-07 01:53:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 671 states have (on average 1.7272727272727273) internal successors, (1159), 1021 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1159 transitions. [2021-11-07 01:53:32,937 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1159 transitions. Word has length 60 [2021-11-07 01:53:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:32,938 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 1159 transitions. [2021-11-07 01:53:32,938 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) [2021-11-07 01:53:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1159 transitions. [2021-11-07 01:53:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:53:32,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:32,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:32,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:33,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:33,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-07 01:53:33,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:33,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473415087] [2021-11-07 01:53:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:33,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:33,160 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:33,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:53:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:33,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:33,694 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 24 treesize of output 20 [2021-11-07 01:53:33,742 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 26 treesize of output 14 [2021-11-07 01:53:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:33,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:33,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473415087] [2021-11-07 01:53:33,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473415087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:33,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:33,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:53:33,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723536988] [2021-11-07 01:53:33,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:33,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:33,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:33,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:33,951 INFO L87 Difference]: Start difference. First operand 1022 states and 1159 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) [2021-11-07 01:53:39,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:39,666 INFO L93 Difference]: Finished difference Result 1682 states and 1907 transitions. [2021-11-07 01:53:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:53:39,666 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 [2021-11-07 01:53:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:39,674 INFO L225 Difference]: With dead ends: 1682 [2021-11-07 01:53:39,674 INFO L226 Difference]: Without dead ends: 1682 [2021-11-07 01:53:39,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:53:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-11-07 01:53:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1021. [2021-11-07 01:53:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 671 states have (on average 1.7257824143070044) internal successors, (1158), 1020 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:39,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1158 transitions. [2021-11-07 01:53:39,700 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1158 transitions. Word has length 66 [2021-11-07 01:53:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:39,700 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 1158 transitions. [2021-11-07 01:53:39,701 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) [2021-11-07 01:53:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1158 transitions. [2021-11-07 01:53:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:53:39,702 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:39,702 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:39,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:53:39,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:39,939 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-07 01:53:39,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:39,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613838207] [2021-11-07 01:53:39,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:39,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:39,941 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:39,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:53:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:53:40,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:40,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:53:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:53:40,566 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 [2021-11-07 01:53:40,649 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 [2021-11-07 01:53:40,654 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 [2021-11-07 01:53:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:40,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:41,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:41,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613838207] [2021-11-07 01:53:41,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613838207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:41,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:53:41,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572514957] [2021-11-07 01:53:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:53:41,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:41,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:53:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:53:41,207 INFO L87 Difference]: Start difference. First operand 1021 states and 1158 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) [2021-11-07 01:53:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:53,820 INFO L93 Difference]: Finished difference Result 1533 states and 1721 transitions. [2021-11-07 01:53:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:53:53,821 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 [2021-11-07 01:53:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:53,826 INFO L225 Difference]: With dead ends: 1533 [2021-11-07 01:53:53,826 INFO L226 Difference]: Without dead ends: 1533 [2021-11-07 01:53:53,826 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 [2021-11-07 01:53:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-11-07 01:53:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1020. [2021-11-07 01:53:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 671 states have (on average 1.7242921013412817) internal successors, (1157), 1019 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1157 transitions. [2021-11-07 01:53:53,842 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1157 transitions. Word has length 67 [2021-11-07 01:53:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:53,842 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1157 transitions. [2021-11-07 01:53:53,842 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) [2021-11-07 01:53:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1157 transitions. [2021-11-07 01:53:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:53:53,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:53,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:53:53,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:54,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:54,057 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:54,058 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-07 01:53:54,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:54,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094585163] [2021-11-07 01:53:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:54,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:54,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:54,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:53:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:53:54,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:54,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:54,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:54,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094585163] [2021-11-07 01:53:54,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094585163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:54,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:54,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:53:54,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329784713] [2021-11-07 01:53:54,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:53:54,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:53:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:53:54,853 INFO L87 Difference]: Start difference. First operand 1020 states and 1157 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) [2021-11-07 01:53:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:54,993 INFO L93 Difference]: Finished difference Result 1890 states and 2124 transitions. [2021-11-07 01:53:54,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:54,994 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 [2021-11-07 01:53:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:55,001 INFO L225 Difference]: With dead ends: 1890 [2021-11-07 01:53:55,001 INFO L226 Difference]: Without dead ends: 1890 [2021-11-07 01:53:55,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:53:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2021-11-07 01:53:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1023. [2021-11-07 01:53:55,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 674 states have (on average 1.7210682492581602) internal successors, (1160), 1022 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1160 transitions. [2021-11-07 01:53:55,018 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1160 transitions. Word has length 71 [2021-11-07 01:53:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:55,018 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1160 transitions. [2021-11-07 01:53:55,019 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) [2021-11-07 01:53:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1160 transitions. [2021-11-07 01:53:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:53:55,019 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:55,020 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] [2021-11-07 01:53:55,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:53:55,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:55,234 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:55,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-07 01:53:55,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:55,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1097240691] [2021-11-07 01:53:55,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:55,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:55,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:55,236 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:55,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:53:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:55,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:55,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:55,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:56,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:56,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1097240691] [2021-11-07 01:53:56,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1097240691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:56,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864327178] [2021-11-07 01:53:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:56,199 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:53:56,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:53:56,208 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:53:56,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:53:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:56,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:53:56,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:57,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:57,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864327178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:57,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296009913] [2021-11-07 01:53:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:57,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:53:57,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:53:57,182 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:53:57,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 01:53:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:57,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:53:57,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:57,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:58,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296009913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:53:58,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:53:58,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 01:53:58,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788946100] [2021-11-07 01:53:58,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:53:58,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:53:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:53:58,205 INFO L87 Difference]: Start difference. First operand 1023 states and 1160 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:59,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:59,160 INFO L93 Difference]: Finished difference Result 2773 states and 3104 transitions. [2021-11-07 01:53:59,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:53:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:53:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:59,172 INFO L225 Difference]: With dead ends: 2773 [2021-11-07 01:53:59,173 INFO L226 Difference]: Without dead ends: 2773 [2021-11-07 01:53:59,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:53:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-11-07 01:53:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 1032. [2021-11-07 01:53:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 683 states have (on average 1.7144948755490483) internal successors, (1171), 1031 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:59,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1171 transitions. [2021-11-07 01:53:59,201 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1171 transitions. Word has length 73 [2021-11-07 01:53:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:59,201 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1171 transitions. [2021-11-07 01:53:59,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1171 transitions. [2021-11-07 01:53:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:53:59,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:59,202 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] [2021-11-07 01:53:59,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-11-07 01:53:59,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-07 01:53:59,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:59,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:59,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 536 more)] === [2021-11-07 01:53:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:59,807 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-07 01:53:59,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:59,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637335259] [2021-11-07 01:53:59,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:53:59,808 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:59,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:59,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:59,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:54:00,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:54:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:54:00,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:54:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:01,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:01,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:01,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637335259] [2021-11-07 01:54:01,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637335259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:01,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [874575826] [2021-11-07 01:54:01,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:54:01,502 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:54:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:54:01,503 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:54:01,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:54:02,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:54:02,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:54:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:54:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:03,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:03,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:03,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [874575826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:54:03,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161700374] [2021-11-07 01:54:03,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:54:03,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:54:03,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:54:03,222 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:54:03,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6c1a0a-76a5-4dd5-ad0e-d9e3e219645a/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 01:54:12,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:54:12,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:54:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:54:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:13,320 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:54:13,321 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 18 treesize of output 18 [2021-11-07 01:54:13,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 01:54:13,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:54:13,414 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 23 treesize of output 19 [2021-11-07 01:54:13,891 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-07 01:54:13,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-07 01:54:13,928 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 01:54:13,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-07 01:54:15,836 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 01:54:15,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 01:54:15,891 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:54:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 01:54:17,503 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 01:54:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 01:54:18,084 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:54:18,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 01:54:18,316 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 01:54:18,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 01:54:21,559 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:54:21,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 01:54:24,083 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 01:54:24,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 01:54:25,287 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:54:25,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 01:54:25,517 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 01:54:25,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-07 01:54:26,885 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-07 01:54:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-07 01:54:27,375 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 01:54:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-07 01:54:27,387 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 01:54:27,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-07 01:54:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:54:27,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:45,962 WARN L207 SmtUtils]: Spent 6.13 s on a formula simplification that was a NOOP. DAG size: 46 [2021-11-07 01:55:27,779 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_2 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1) (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1) (bvadd v_subst_2 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse1))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (v_subst_1 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse2 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr239| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd v_subst_1 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse6 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base| (let ((.cse3 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base|) .cse2 .cse3) .cse4 .cse3) .cse5 .cse3))) c_ULTIMATE.start_main_~user~0.base) .cse6) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem40.base| (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem40.base|) .cse2 (_ bv0 32)) .cse4 (_ bv0 32)) .cse5 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse6)))))) is different from false