./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7 --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 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:51:41,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:51:41,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:51:41,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:51:41,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:51:41,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:51:41,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:51:41,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:51:41,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:51:41,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:51:41,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:51:41,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:51:41,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:51:41,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:51:41,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:51:41,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:51:41,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:51:41,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:51:41,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:51:41,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:51:41,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:51:41,324 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:51:41,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:51:41,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:51:41,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:51:41,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:51:41,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:51:41,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:51:41,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:51:41,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:51:41,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:51:41,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:51:41,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:51:41,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:51:41,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:51:41,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:51:41,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:51:41,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:51:41,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:51:41,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:51:41,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:51:41,350 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 17:51:41,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:51:41,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:51:41,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:51:41,398 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:51:41,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:51:41,399 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:51:41,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:51:41,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:51:41,400 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:51:41,400 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:51:41,402 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:51:41,402 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:51:41,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:51:41,403 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:51:41,403 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:51:41,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:51:41,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:51:41,404 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:51:41,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 17:51:41,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 17:51:41,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:51:41,406 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:51:41,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:51:41,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:51:41,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:51:41,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:51:41,409 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 17:51:41,409 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 17:51:41,409 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 17:51:41,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:51:41,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:51:41,410 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:51:41,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:51:41,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:51:41,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:51:41,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:41,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:51:41,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:51:41,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:51:41,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:51:41,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:51:41,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:51:41,413 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_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-25 17:51:41,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:51:41,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:51:41,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:51:41,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:51:41,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:51:41,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-25 17:51:41,831 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/6bf5d25ba/12fda44ee9e94b5e903719d17529f3b0/FLAGf33480999 [2021-11-25 17:51:42,387 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:51:42,388 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-25 17:51:42,407 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/6bf5d25ba/12fda44ee9e94b5e903719d17529f3b0/FLAGf33480999 [2021-11-25 17:51:42,663 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/6bf5d25ba/12fda44ee9e94b5e903719d17529f3b0 [2021-11-25 17:51:42,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:51:42,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:51:42,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:42,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:51:42,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:51:42,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:42" (1/1) ... [2021-11-25 17:51:42,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fdd6cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:42, skipping insertion in model container [2021-11-25 17:51:42,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:42" (1/1) ... [2021-11-25 17:51:42,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:51:42,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:43,169 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:43,183 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) [2021-11-25 17:51:43,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62284441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:43, skipping insertion in model container [2021-11-25 17:51:43,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:43,184 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-25 17:51:43,188 INFO L158 Benchmark]: Toolchain (without parser) took 518.06ms. Allocated memory is still 148.9MB. Free memory was 113.9MB in the beginning and 123.8MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 17:51:43,190 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 17:51:43,192 INFO L158 Benchmark]: CACSL2BoogieTranslator took 514.21ms. Allocated memory is still 148.9MB. Free memory was 113.6MB in the beginning and 123.8MB in the end (delta: -10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 17:51:43,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 98.6MB. Free memory is still 51.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 514.21ms. Allocated memory is still 148.9MB. Free memory was 113.6MB in the beginning and 123.8MB in the end (delta: -10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 533]: 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_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7 --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 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:51:45,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:51:45,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:51:45,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:51:45,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:51:45,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:51:45,925 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:51:45,928 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:51:45,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:51:45,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:51:45,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:51:45,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:51:45,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:51:45,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:51:45,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:51:45,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:51:45,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:51:45,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:51:45,955 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:51:45,963 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:51:45,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:51:45,969 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:51:45,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:51:45,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:51:45,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:51:45,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:51:45,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:51:45,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:51:45,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:51:45,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:51:45,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:51:45,985 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:51:45,986 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:51:45,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:51:45,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:51:45,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:51:45,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:51:45,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:51:45,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:51:45,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:51:45,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:51:45,997 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-25 17:51:46,031 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:51:46,032 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:51:46,032 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:51:46,033 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:51:46,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:51:46,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:51:46,035 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:51:46,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:51:46,035 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:51:46,036 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:51:46,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:51:46,037 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:51:46,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 17:51:46,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 17:51:46,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:51:46,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:51:46,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 17:51:46,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:51:46,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:51:46,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:51:46,041 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 17:51:46,041 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 17:51:46,042 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 17:51:46,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:51:46,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 17:51:46,043 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-25 17:51:46,044 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-25 17:51:46,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:51:46,044 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:51:46,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:51:46,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-25 17:51:46,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:51:46,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:46,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:51:46,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:51:46,047 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-25 17:51:46,048 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-25 17:51:46,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:51:46,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:51:46,049 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_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-25 17:51:46,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:51:46,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:51:46,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:51:46,493 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:51:46,494 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:51:46,496 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-25 17:51:46,590 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/c18a33057/f92a42eef111459d8f0c732841e2f399/FLAG5c5fffc4f [2021-11-25 17:51:47,347 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:51:47,348 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-25 17:51:47,368 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/c18a33057/f92a42eef111459d8f0c732841e2f399/FLAG5c5fffc4f [2021-11-25 17:51:47,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/data/c18a33057/f92a42eef111459d8f0c732841e2f399 [2021-11-25 17:51:47,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:51:47,613 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:51:47,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:47,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:51:47,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:51:47,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:47" (1/1) ... [2021-11-25 17:51:47,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70174e92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:47, skipping insertion in model container [2021-11-25 17:51:47,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:47" (1/1) ... [2021-11-25 17:51:47,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:51:47,680 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:48,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:48,136 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-25 17:51:48,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:48,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:48,225 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:51:48,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:48,345 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:51:48,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48 WrapperNode [2021-11-25 17:51:48,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:48,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:48,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:51:48,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:51:48,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,435 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-25 17:51:48,436 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:48,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:51:48,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:51:48,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:51:48,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,503 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:51:48,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:51:48,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:51:48,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:51:48,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (1/1) ... [2021-11-25 17:51:48,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:48,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:51:48,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:51:48,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-25 17:51:48,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 17:51:48,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 17:51:48,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-25 17:51:48,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:51:48,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:51:48,791 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:51:48,793 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:51:49,402 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:51:49,409 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:51:49,410 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 17:51:49,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:49 BoogieIcfgContainer [2021-11-25 17:51:49,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:51:49,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:51:49,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:51:49,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:51:49,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:47" (1/3) ... [2021-11-25 17:51:49,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dda8540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:49, skipping insertion in model container [2021-11-25 17:51:49,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:48" (2/3) ... [2021-11-25 17:51:49,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dda8540 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:49, skipping insertion in model container [2021-11-25 17:51:49,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:49" (3/3) ... [2021-11-25 17:51:49,442 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-11-25 17:51:49,449 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:51:49,450 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-25 17:51:49,531 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:51:49,545 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 [2021-11-25 17:51:49,545 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-25 17:51:49,584 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:51:49,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:49,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:51:49,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-25 17:51:49,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:49,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706212319] [2021-11-25 17:51:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:49,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:49,625 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:49,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-25 17:51:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:51:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:49,938 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 [2021-11-25 17:51:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:49,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:49,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706212319] [2021-11-25 17:51:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706212319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:49,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:49,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 17:51:49,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624240031] [2021-11-25 17:51:49,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:49,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:49,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:50,017 INFO L87 Difference]: Start difference. First operand has 42 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:50,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:50,177 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-25 17:51:50,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:50,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 17:51:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:50,194 INFO L225 Difference]: With dead ends: 41 [2021-11-25 17:51:50,194 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 17:51:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:50,201 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:50,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 17:51:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-25 17:51:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-25 17:51:50,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-11-25 17:51:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:50,246 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-25 17:51:50,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-25 17:51:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:51:50,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:50,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:51:50,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:50,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:50,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:50,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:50,462 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-25 17:51:50,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:50,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349498951] [2021-11-25 17:51:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:50,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:50,467 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:50,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-25 17:51:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 17:51:50,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:50,616 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 [2021-11-25 17:51:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:50,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:50,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:50,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349498951] [2021-11-25 17:51:50,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349498951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:50,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:50,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:50,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284336970] [2021-11-25 17:51:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:50,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:50,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:50,697 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:51,197 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-25 17:51:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:51:51,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 17:51:51,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:51,221 INFO L225 Difference]: With dead ends: 79 [2021-11-25 17:51:51,222 INFO L226 Difference]: Without dead ends: 79 [2021-11-25 17:51:51,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:51,224 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 44 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:51,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 150 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-25 17:51:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2021-11-25 17:51:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-25 17:51:51,244 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 6 [2021-11-25 17:51:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:51,245 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-25 17:51:51,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-25 17:51:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 17:51:51,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:51,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 17:51:51,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:51,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:51,458 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:51,459 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2021-11-25 17:51:51,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:51,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704220128] [2021-11-25 17:51:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:51,460 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:51,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:51,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:51,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-25 17:51:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:51:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:51,554 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 8 treesize of output 7 [2021-11-25 17:51:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:51,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:51,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:51,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704220128] [2021-11-25 17:51:51,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704220128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:51,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:51,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:51,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890470324] [2021-11-25 17:51:51,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:51,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:51,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:51,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:51,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:51,673 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:51,715 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-25 17:51:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:51:51,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-25 17:51:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:51,717 INFO L225 Difference]: With dead ends: 44 [2021-11-25 17:51:51,717 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 17:51:51,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:51,720 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:51,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 97 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2021-11-25 17:51:51,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 17:51:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-25 17:51:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-25 17:51:51,732 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-11-25 17:51:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:51,732 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-25 17:51:51,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:51,733 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-25 17:51:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:51:51,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:51,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:51,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:51,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:51,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:51,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:51,959 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-25 17:51:51,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336259230] [2021-11-25 17:51:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:51,960 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:51,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:51,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:51,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-25 17:51:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:51:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:52,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 17:51:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:52,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:52,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:52,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336259230] [2021-11-25 17:51:52,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336259230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:52,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:52,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:52,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289696672] [2021-11-25 17:51:52,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:52,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:52,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:52,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:52,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:52,104 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:52,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:52,347 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-25 17:51:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:51:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-25 17:51:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:52,349 INFO L225 Difference]: With dead ends: 37 [2021-11-25 17:51:52,349 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 17:51:52,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:52,351 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:52,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:51:52,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 17:51:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 17:51:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:52,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-25 17:51:52,358 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-11-25 17:51:52,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:52,358 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-25 17:51:52,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-25 17:51:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 17:51:52,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:52,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:52,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:52,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:52,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:52,574 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-25 17:51:52,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:52,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [973405005] [2021-11-25 17:51:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:52,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:52,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:52,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-25 17:51:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 17:51:52,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:52,764 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 8 treesize of output 7 [2021-11-25 17:51:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:53,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:53,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:53,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [973405005] [2021-11-25 17:51:53,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [973405005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:53,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:53,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:51:53,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143980747] [2021-11-25 17:51:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:53,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:53,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:53,006 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2021-11-25 17:51:53,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:53,049 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-11-25 17:51:53,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 [2021-11-25 17:51:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:53,053 INFO L225 Difference]: With dead ends: 40 [2021-11-25 17:51:53,057 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 17:51:53,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:53,061 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:53,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-11-25 17:51:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 17:51:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 17:51:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.4375) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-11-25 17:51:53,073 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 8 [2021-11-25 17:51:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:53,073 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-11-25 17:51:53,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) [2021-11-25 17:51:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-11-25 17:51:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 17:51:53,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:53,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:53,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:53,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:53,290 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:53,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:53,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1184052306, now seen corresponding path program 1 times [2021-11-25 17:51:53,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:53,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268988247] [2021-11-25 17:51:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:53,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:53,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:53,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:53,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-25 17:51:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:53,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:51:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:53,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:53,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:53,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268988247] [2021-11-25 17:51:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268988247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:53,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:53,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:51:53,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700905750] [2021-11-25 17:51:53,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:53,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:53,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:53,475 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:53,545 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-25 17:51:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:51:53,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 17:51:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:53,547 INFO L225 Difference]: With dead ends: 39 [2021-11-25 17:51:53,547 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 17:51:53,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:53,548 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 36 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:53,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 59 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 17:51:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2021-11-25 17:51:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-25 17:51:53,554 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 9 [2021-11-25 17:51:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:53,555 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-25 17:51:53,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-25 17:51:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:51:53,556 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:53,556 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:53,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:53,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:53,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-25 17:51:53,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:53,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660849555] [2021-11-25 17:51:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:53,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:53,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:53,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-25 17:51:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:53,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:51:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:53,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:53,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660849555] [2021-11-25 17:51:53,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660849555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:53,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488185439] [2021-11-25 17:51:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:53,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:51:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:51:54,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:51:54,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-25 17:51:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:51:54,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:54,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:54,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488185439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:54,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623472836] [2021-11-25 17:51:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:54,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:54,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:54,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 17:51:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:54,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 17:51:54,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:54,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623472836] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:54,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:51:54,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 17:51:54,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099916964] [2021-11-25 17:51:54,465 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:54,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:51:54,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:54,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:51:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:51:54,468 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-25 17:51:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:54,585 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-11-25 17:51:54,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 10 [2021-11-25 17:51:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:54,591 INFO L225 Difference]: With dead ends: 65 [2021-11-25 17:51:54,591 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 17:51:54,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:51:54,592 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:54,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 17:51:54,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2021-11-25 17:51:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:54,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-25 17:51:54,606 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 10 [2021-11-25 17:51:54,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:54,606 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-25 17:51:54,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-25 17:51:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-25 17:51:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 17:51:54,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:54,608 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:54,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:54,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:55,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:55,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:55,211 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:55,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:55,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-25 17:51:55,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:55,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309788500] [2021-11-25 17:51:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:55,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:55,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:55,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-25 17:51:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 17:51:55,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:55,324 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 8 treesize of output 7 [2021-11-25 17:51:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:55,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:56,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309788500] [2021-11-25 17:51:56,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309788500] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:56,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666942290] [2021-11-25 17:51:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:56,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:51:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:51:56,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:51:56,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-25 17:51:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:56,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 17:51:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:56,484 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 8 treesize of output 7 [2021-11-25 17:51:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:56,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:56,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [666942290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:56,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008344895] [2021-11-25 17:51:56,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:56,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:56,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:56,922 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 17:51:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 17:51:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:57,008 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 8 treesize of output 7 [2021-11-25 17:51:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:57,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:51:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:57,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008344895] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:51:57,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:51:57,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-25 17:51:57,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504544349] [2021-11-25 17:51:57,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:51:57,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 17:51:57,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:57,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 17:51:57,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:51:57,490 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:58,299 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-11-25 17:51:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 17:51:58,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 17:51:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:58,309 INFO L225 Difference]: With dead ends: 73 [2021-11-25 17:51:58,309 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 17:51:58,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-25 17:51:58,311 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 184 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:58,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 81 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 5 Unchecked, 0.7s Time] [2021-11-25 17:51:58,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 17:51:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-11-25 17:51:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-25 17:51:58,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 10 [2021-11-25 17:51:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:58,319 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-25 17:51:58,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-25 17:51:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 17:51:58,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:58,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:58,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:58,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:58,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:58,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:58,922 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash -680998147, now seen corresponding path program 1 times [2021-11-25 17:51:58,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659978256] [2021-11-25 17:51:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:58,923 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:58,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:58,925 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:58,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-25 17:51:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:51:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:59,013 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 [2021-11-25 17:51:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:51:59,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:59,105 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:51:59,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659978256] [2021-11-25 17:51:59,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659978256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:59,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:59,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:51:59,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514297812] [2021-11-25 17:51:59,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:59,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:59,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:51:59,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:59,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:59,108 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-25 17:51:59,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:59,523 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-11-25 17:51:59,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:51:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 17:51:59,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:59,526 INFO L225 Difference]: With dead ends: 90 [2021-11-25 17:51:59,526 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 17:51:59,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 17:51:59,527 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 111 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:59,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 99 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 17:51:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-11-25 17:51:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.309090909090909) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:51:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-25 17:51:59,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 12 [2021-11-25 17:51:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:59,536 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-25 17:51:59,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-25 17:51:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-25 17:51:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 17:51:59,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:59,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:59,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:59,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:51:59,751 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:51:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1074025157, now seen corresponding path program 1 times [2021-11-25 17:51:59,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:51:59,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224689000] [2021-11-25 17:51:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:59,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:51:59,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:51:59,754 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:51:59,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-25 17:51:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 17:51:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:59,851 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 8 treesize of output 7 [2021-11-25 17:52:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:00,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:00,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:00,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224689000] [2021-11-25 17:52:00,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224689000] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 17:52:00,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:52:00,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-11-25 17:52:00,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46187460] [2021-11-25 17:52:00,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:00,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:52:00,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:52:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 17:52:00,560 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-25 17:52:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:00,898 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2021-11-25 17:52:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:52:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 17:52:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:00,899 INFO L225 Difference]: With dead ends: 63 [2021-11-25 17:52:00,899 INFO L226 Difference]: Without dead ends: 63 [2021-11-25 17:52:00,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:52:00,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:00,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 32 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:52:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-25 17:52:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-11-25 17:52:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-25 17:52:00,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2021-11-25 17:52:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:00,906 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-25 17:52:00,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2021-11-25 17:52:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-25 17:52:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:52:00,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:00,907 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:00,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-25 17:52:01,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:01,118 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:01,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:01,119 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-11-25 17:52:01,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:01,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411145731] [2021-11-25 17:52:01,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:01,119 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:01,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:01,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-25 17:52:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 17:52:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:01,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:01,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:01,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411145731] [2021-11-25 17:52:01,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411145731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:01,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:01,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:52:01,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894804706] [2021-11-25 17:52:01,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:01,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:52:01,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:52:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:52:01,215 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:01,378 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-11-25 17:52:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:52:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 17:52:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:01,380 INFO L225 Difference]: With dead ends: 80 [2021-11-25 17:52:01,380 INFO L226 Difference]: Without dead ends: 80 [2021-11-25 17:52:01,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:01,382 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:01,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:52:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-25 17:52:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 48. [2021-11-25 17:52:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-11-25 17:52:01,388 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 13 [2021-11-25 17:52:01,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:01,389 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-11-25 17:52:01,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-11-25 17:52:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 17:52:01,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:01,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:01,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:01,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:01,618 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:01,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1064957999, now seen corresponding path program 1 times [2021-11-25 17:52:01,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:01,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658069700] [2021-11-25 17:52:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:01,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:01,619 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:01,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-25 17:52:01,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:52:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:01,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:01,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658069700] [2021-11-25 17:52:01,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658069700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:01,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [227045523] [2021-11-25 17:52:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:01,888 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:52:01,890 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:52:01,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-25 17:52:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:52:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:02,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [227045523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882864103] [2021-11-25 17:52:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:02,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:02,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:02,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:02,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 17:52:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:02,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:02,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:02,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882864103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:02,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-25 17:52:02,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6, 7, 6] total 12 [2021-11-25 17:52:02,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040135511] [2021-11-25 17:52:02,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:02,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:52:02,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:02,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:52:02,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:52:02,284 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:02,435 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-25 17:52:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:52:02,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 17:52:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:02,436 INFO L225 Difference]: With dead ends: 61 [2021-11-25 17:52:02,436 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 17:52:02,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-25 17:52:02,437 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:02,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:52:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 17:52:02,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-11-25 17:52:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 45 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) [2021-11-25 17:52:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-25 17:52:02,441 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-11-25 17:52:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:02,442 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-25 17:52:02,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-25 17:52:02,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:52:02,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:02,443 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:02,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:02,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:02,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:03,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:03,044 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-11-25 17:52:03,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:03,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678544371] [2021-11-25 17:52:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:03,044 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:03,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:03,047 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:03,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-25 17:52:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:03,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678544371] [2021-11-25 17:52:03,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678544371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1146072887] [2021-11-25 17:52:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:03,274 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:03,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:52:03,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:52:03,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-25 17:52:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1146072887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:03,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833461725] [2021-11-25 17:52:03,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:03,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:03,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:03,498 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:03,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-25 17:52:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:03,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:03,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833461725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:03,665 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:52:03,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-25 17:52:03,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515947537] [2021-11-25 17:52:03,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:03,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 17:52:03,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:03,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 17:52:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 17:52:03,669 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:03,846 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-11-25 17:52:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:52:03,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 17:52:03,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:03,848 INFO L225 Difference]: With dead ends: 65 [2021-11-25 17:52:03,848 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 17:52:03,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:52:03,849 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:03,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 96 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:52:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 17:52:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-25 17:52:03,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-25 17:52:03,853 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-11-25 17:52:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:03,853 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-25 17:52:03,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-25 17:52:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:52:03,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:03,855 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-25 17:52:03,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:04,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:04,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:04,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:04,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-25 17:52:04,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:04,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1068795915] [2021-11-25 17:52:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:52:04,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:04,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:04,458 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:04,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-25 17:52:04,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:52:04,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:04,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 17:52:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:04,557 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 8 treesize of output 7 [2021-11-25 17:52:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:04,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:05,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1068795915] [2021-11-25 17:52:05,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1068795915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:05,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1454261573] [2021-11-25 17:52:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:52:05,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:52:05,974 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:52:05,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-25 17:52:06,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:52:06,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:52:06,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:06,185 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 8 treesize of output 7 [2021-11-25 17:52:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:06,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:06,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1454261573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:06,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795095696] [2021-11-25 17:52:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:52:06,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:06,999 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:07,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-25 17:52:07,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:52:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:07,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 17:52:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:07,088 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 8 treesize of output 7 [2021-11-25 17:52:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:07,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:08,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795095696] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:08,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:52:08,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-25 17:52:08,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812897139] [2021-11-25 17:52:08,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:08,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 17:52:08,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 17:52:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-25 17:52:08,651 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:11,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:11,504 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-11-25 17:52:11,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 17:52:11,506 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-11-25 17:52:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:11,507 INFO L225 Difference]: With dead ends: 183 [2021-11-25 17:52:11,507 INFO L226 Difference]: Without dead ends: 183 [2021-11-25 17:52:11,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=313, Invalid=743, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 17:52:11,509 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 540 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:11,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 428 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 348 Invalid, 0 Unknown, 41 Unchecked, 1.3s Time] [2021-11-25 17:52:11,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-25 17:52:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-11-25 17:52:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.2) internal successors, (90), 77 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-25 17:52:11,514 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-11-25 17:52:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:11,515 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-25 17:52:11,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-25 17:52:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 17:52:11,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:11,516 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:11,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:11,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-25 17:52:11,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-25 17:52:12,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:12,127 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-11-25 17:52:12,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:12,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086167810] [2021-11-25 17:52:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:12,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:12,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:12,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:12,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-25 17:52:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:12,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 17:52:12,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:12,226 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 8 treesize of output 7 [2021-11-25 17:52:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:12,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:13,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086167810] [2021-11-25 17:52:13,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086167810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:13,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042119860] [2021-11-25 17:52:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:13,331 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:52:13,333 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:52:13,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-25 17:52:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 17:52:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:13,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042119860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267428005] [2021-11-25 17:52:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:14,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:14,030 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:14,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-25 17:52:14,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 17:52:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:14,106 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 8 treesize of output 7 [2021-11-25 17:52:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:14,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:14,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267428005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:14,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:52:14,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 26 [2021-11-25 17:52:14,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600242683] [2021-11-25 17:52:14,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:14,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 17:52:14,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 17:52:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-25 17:52:14,815 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:16,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:16,472 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2021-11-25 17:52:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 17:52:16,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 17:52:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:16,474 INFO L225 Difference]: With dead ends: 132 [2021-11-25 17:52:16,474 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 17:52:16,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=305, Invalid=1255, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 17:52:16,476 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 407 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:16,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 193 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 239 Invalid, 0 Unknown, 16 Unchecked, 0.7s Time] [2021-11-25 17:52:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 17:52:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-11-25 17:52:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 103 states have (on average 1.203883495145631) internal successors, (124), 105 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-25 17:52:16,483 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-11-25 17:52:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:16,484 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-25 17:52:16,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-25 17:52:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 17:52:16,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:16,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:16,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:16,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-25 17:52:16,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-25 17:52:17,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:17,087 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:17,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:17,088 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-11-25 17:52:17,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:17,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767790620] [2021-11-25 17:52:17,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:17,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:17,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:17,089 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:17,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-25 17:52:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:17,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:52:17,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:17,292 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:17,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767790620] [2021-11-25 17:52:17,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767790620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:17,292 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:17,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:52:17,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958900807] [2021-11-25 17:52:17,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:17,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:52:17,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:17,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:52:17,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:17,294 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:17,298 INFO L93 Difference]: Finished difference Result 142 states and 170 transitions. [2021-11-25 17:52:17,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:52:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 17:52:17,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:17,301 INFO L225 Difference]: With dead ends: 142 [2021-11-25 17:52:17,301 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 17:52:17,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:17,303 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:17,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 77 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-11-25 17:52:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 17:52:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2021-11-25 17:52:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 128 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2021-11-25 17:52:17,317 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 19 [2021-11-25 17:52:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:17,318 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2021-11-25 17:52:17,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2021-11-25 17:52:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 17:52:17,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:17,320 INFO L514 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] [2021-11-25 17:52:17,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-25 17:52:17,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:17,530 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1147657014, now seen corresponding path program 1 times [2021-11-25 17:52:17,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:17,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269550792] [2021-11-25 17:52:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:17,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:17,532 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:17,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-25 17:52:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:52:17,814 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:17,814 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269550792] [2021-11-25 17:52:17,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269550792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:17,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:17,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:52:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178675473] [2021-11-25 17:52:17,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:17,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:52:17,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:52:17,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:17,816 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:17,834 INFO L93 Difference]: Finished difference Result 173 states and 207 transitions. [2021-11-25 17:52:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:52:17,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 17:52:17,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:17,837 INFO L225 Difference]: With dead ends: 173 [2021-11-25 17:52:17,837 INFO L226 Difference]: Without dead ends: 161 [2021-11-25 17:52:17,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:17,838 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:17,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 76 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2021-11-25 17:52:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-25 17:52:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2021-11-25 17:52:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 136 states have (on average 1.2058823529411764) internal successors, (164), 138 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2021-11-25 17:52:17,843 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 25 [2021-11-25 17:52:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:17,843 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2021-11-25 17:52:17,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2021-11-25 17:52:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 17:52:17,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:17,844 INFO L514 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] [2021-11-25 17:52:17,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:18,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:18,045 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:18,045 INFO L85 PathProgramCache]: Analyzing trace with hash 989408118, now seen corresponding path program 1 times [2021-11-25 17:52:18,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:18,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601504790] [2021-11-25 17:52:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:18,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:18,047 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:18,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-25 17:52:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:18,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:52:18,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 17:52:18,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:18,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:18,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601504790] [2021-11-25 17:52:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601504790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:18,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:18,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:52:18,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755197314] [2021-11-25 17:52:18,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:52:18,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:52:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:18,288 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:18,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:18,305 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2021-11-25 17:52:18,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:52:18,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 17:52:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:18,307 INFO L225 Difference]: With dead ends: 195 [2021-11-25 17:52:18,307 INFO L226 Difference]: Without dead ends: 191 [2021-11-25 17:52:18,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:52:18,308 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:18,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 58 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-11-25 17:52:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-25 17:52:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2021-11-25 17:52:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 180 states have (on average 1.2222222222222223) internal successors, (220), 182 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2021-11-25 17:52:18,314 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 25 [2021-11-25 17:52:18,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:18,315 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2021-11-25 17:52:18,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2021-11-25 17:52:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 17:52:18,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:18,322 INFO L514 BasicCegarLoop]: trace histogram [2, 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] [2021-11-25 17:52:18,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-25 17:52:18,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:18,533 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:18,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 630576131, now seen corresponding path program 1 times [2021-11-25 17:52:18,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587352659] [2021-11-25 17:52:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:18,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:18,536 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:18,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-25 17:52:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 17:52:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:18,915 INFO L354 Elim1Store]: treesize reduction 442, result has 12.5 percent of original size [2021-11-25 17:52:18,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 260 treesize of output 93 [2021-11-25 17:52:19,305 INFO L354 Elim1Store]: treesize reduction 105, result has 0.9 percent of original size [2021-11-25 17:52:19,305 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 173 treesize of output 68 [2021-11-25 17:52:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:52:19,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:52:19,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587352659] [2021-11-25 17:52:19,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587352659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:19,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:19,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-25 17:52:19,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340555564] [2021-11-25 17:52:19,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:19,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 17:52:19,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 17:52:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 17:52:19,415 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:19,693 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2021-11-25 17:52:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 17:52:19,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-25 17:52:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:19,695 INFO L225 Difference]: With dead ends: 181 [2021-11-25 17:52:19,695 INFO L226 Difference]: Without dead ends: 163 [2021-11-25 17:52:19,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-25 17:52:19,696 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:19,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 117 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2021-11-25 17:52:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-25 17:52:19,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2021-11-25 17:52:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 160 states have (on average 1.225) internal successors, (196), 162 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 196 transitions. [2021-11-25 17:52:19,700 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 196 transitions. Word has length 31 [2021-11-25 17:52:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:19,701 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 196 transitions. [2021-11-25 17:52:19,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:19,701 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 196 transitions. [2021-11-25 17:52:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 17:52:19,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:19,702 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-25 17:52:19,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-25 17:52:19,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:52:19,913 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:52:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-25 17:52:19,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:52:19,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85739774] [2021-11-25 17:52:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:19,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:52:19,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:52:19,915 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:52:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-25 17:52:20,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 17:52:20,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 17:52:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:20,082 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 8 treesize of output 7 [2021-11-25 17:52:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:20,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:22,812 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:52:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85739774] [2021-11-25 17:52:22,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85739774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:22,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [849739135] [2021-11-25 17:52:22,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:22,813 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:52:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:52:22,818 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:52:22,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-25 17:52:23,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 17:52:23,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-25 17:52:23,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:23,184 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 8 treesize of output 7 [2021-11-25 17:52:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:24,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:31,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [849739135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:31,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733298970] [2021-11-25 17:52:31,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:52:31,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:52:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:52:31,746 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:52:31,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-25 17:52:32,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-25 17:52:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:52:32,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 17:52:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:52:32,470 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 8 treesize of output 7 [2021-11-25 17:52:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:52:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:52:38,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733298970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:52:38,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:52:38,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2021-11-25 17:52:38,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291497242] [2021-11-25 17:52:38,568 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:52:38,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-25 17:52:38,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:52:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-25 17:52:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 17:52:38,571 INFO L87 Difference]: Start difference. First operand 163 states and 196 transitions. Second operand has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:52:42,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:44,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:46,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:48,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:53,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:55,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:57,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:52:59,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:53:02,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:53:04,932 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:53:06,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:53:09,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:53:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:16,546 INFO L93 Difference]: Finished difference Result 1731 states and 2096 transitions. [2021-11-25 17:53:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 17:53:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 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 [2021-11-25 17:53:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:16,556 INFO L225 Difference]: With dead ends: 1731 [2021-11-25 17:53:16,556 INFO L226 Difference]: Without dead ends: 1731 [2021-11-25 17:53:16,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1458, Invalid=3654, Unknown=0, NotChecked=0, Total=5112 [2021-11-25 17:53:16,558 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2506 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 72 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2506 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 26.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:16,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2506 Valid, 1360 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1237 Invalid, 6 Unknown, 22 Unchecked, 26.8s Time] [2021-11-25 17:53:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-11-25 17:53:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 195. [2021-11-25 17:53:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 192 states have (on average 1.2291666666666667) internal successors, (236), 194 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 236 transitions. [2021-11-25 17:53:16,576 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 236 transitions. Word has length 34 [2021-11-25 17:53:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:16,576 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 236 transitions. [2021-11-25 17:53:16,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:16,577 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 236 transitions. [2021-11-25 17:53:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 17:53:16,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:16,578 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:16,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-25 17:53:16,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-25 17:53:17,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-25 17:53:17,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:17,181 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:53:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:17,181 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 2 times [2021-11-25 17:53:17,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:53:17,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478322047] [2021-11-25 17:53:17,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:53:17,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:53:17,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:53:17,183 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:53:17,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-25 17:53:17,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:53:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 17:53:17,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:17,334 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 8 treesize of output 7 [2021-11-25 17:53:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:53:17,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:19,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 17:53:19,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:53:19,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478322047] [2021-11-25 17:53:19,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478322047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:19,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1877300872] [2021-11-25 17:53:19,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:53:19,348 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:53:19,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:53:19,362 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:53:19,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-25 17:53:19,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:53:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:19,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:53:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:53:20,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:53:20,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1877300872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:20,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166465663] [2021-11-25 17:53:20,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:53:20,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:20,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:20,892 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:20,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-25 17:53:20,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:53:20,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:53:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:53:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:20,986 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 8 treesize of output 7 [2021-11-25 17:53:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:21,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:53:25,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166465663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:25,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:53:25,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 11, 11] total 50 [2021-11-25 17:53:25,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309921634] [2021-11-25 17:53:25,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:53:25,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-25 17:53:25,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:53:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-25 17:53:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 17:53:25,327 INFO L87 Difference]: Start difference. First operand 195 states and 236 transitions. Second operand has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:34,096 INFO L93 Difference]: Finished difference Result 278 states and 336 transitions. [2021-11-25 17:53:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-25 17:53:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 0 states have call successors, (0), 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 [2021-11-25 17:53:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:34,098 INFO L225 Difference]: With dead ends: 278 [2021-11-25 17:53:34,098 INFO L226 Difference]: Without dead ends: 276 [2021-11-25 17:53:34,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=712, Invalid=5608, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 17:53:34,101 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 185 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:34,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 715 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 311 Invalid, 0 Unknown, 17 Unchecked, 1.5s Time] [2021-11-25 17:53:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-25 17:53:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 231. [2021-11-25 17:53:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.2412280701754386) internal successors, (283), 230 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 283 transitions. [2021-11-25 17:53:34,109 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 283 transitions. Word has length 34 [2021-11-25 17:53:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:34,110 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 283 transitions. [2021-11-25 17:53:34,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.4) internal successors, (170), 50 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 283 transitions. [2021-11-25 17:53:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 17:53:34,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:34,111 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:34,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-25 17:53:34,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-25 17:53:34,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:34,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:53:34,718 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:53:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 698168797, now seen corresponding path program 1 times [2021-11-25 17:53:34,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:53:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26851382] [2021-11-25 17:53:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:34,720 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:53:34,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:53:34,726 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:53:34,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-25 17:53:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:34,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:53:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:34,875 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 8 treesize of output 7 [2021-11-25 17:53:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:53:35,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:53:39,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:53:39,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26851382] [2021-11-25 17:53:39,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26851382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:39,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1061422293] [2021-11-25 17:53:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:39,469 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:53:39,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:53:39,478 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:53:39,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-25 17:53:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:39,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:53:39,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:53:40,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:53:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1061422293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:41,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237283008] [2021-11-25 17:53:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:41,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:53:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:53:41,963 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:53:41,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-25 17:53:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:53:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:42,073 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 8 treesize of output 7 [2021-11-25 17:53:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:53:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:53:46,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237283008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:46,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:53:46,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-25 17:53:46,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709958283] [2021-11-25 17:53:46,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:53:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:53:46,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:53:46,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:53:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:53:46,961 INFO L87 Difference]: Start difference. First operand 231 states and 283 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:53:52,974 INFO L93 Difference]: Finished difference Result 287 states and 348 transitions. [2021-11-25 17:53:52,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 17:53:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 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 40 [2021-11-25 17:53:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:53:52,978 INFO L225 Difference]: With dead ends: 287 [2021-11-25 17:53:52,979 INFO L226 Difference]: Without dead ends: 277 [2021-11-25 17:53:52,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=428, Invalid=3232, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 17:53:52,981 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 171 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:53:52,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 521 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 392 Invalid, 0 Unknown, 27 Unchecked, 2.1s Time] [2021-11-25 17:53:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-25 17:53:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 253. [2021-11-25 17:53:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 250 states have (on average 1.244) internal successors, (311), 252 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 311 transitions. [2021-11-25 17:53:52,991 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 311 transitions. Word has length 40 [2021-11-25 17:53:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:53:52,991 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 311 transitions. [2021-11-25 17:53:52,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:53:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 311 transitions. [2021-11-25 17:53:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 17:53:52,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:53:52,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:53:53,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:53,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-25 17:53:53,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-25 17:53:53,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:53:53,608 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:53:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:53:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1768682083, now seen corresponding path program 1 times [2021-11-25 17:53:53,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:53:53,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435884238] [2021-11-25 17:53:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:53,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:53:53,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:53:53,610 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:53:53,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-25 17:53:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:53:53,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:53,730 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 8 treesize of output 7 [2021-11-25 17:53:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:53:54,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:53:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:53:58,694 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:53:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435884238] [2021-11-25 17:53:58,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435884238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:53:58,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843999452] [2021-11-25 17:53:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:53:58,694 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:53:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:53:58,695 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:53:58,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-25 17:53:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:53:58,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:53:58,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:53:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:53:59,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:54:00,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843999452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:00,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035918015] [2021-11-25 17:54:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:00,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:00,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:00,978 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:00,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-25 17:54:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:01,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:54:01,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:01,103 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 8 treesize of output 7 [2021-11-25 17:54:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:02,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:05,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035918015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:05,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:54:05,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-25 17:54:05,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42977334] [2021-11-25 17:54:05,274 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:05,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:54:05,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:54:05,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:54:05,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:54:05,276 INFO L87 Difference]: Start difference. First operand 253 states and 311 transitions. Second operand has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:09,713 INFO L93 Difference]: Finished difference Result 300 states and 363 transitions. [2021-11-25 17:54:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 17:54:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 40 [2021-11-25 17:54:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:09,717 INFO L225 Difference]: With dead ends: 300 [2021-11-25 17:54:09,717 INFO L226 Difference]: Without dead ends: 286 [2021-11-25 17:54:09,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=428, Invalid=3232, Unknown=0, NotChecked=0, Total=3660 [2021-11-25 17:54:09,719 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 142 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:09,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 708 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 367 Invalid, 0 Unknown, 73 Unchecked, 1.1s Time] [2021-11-25 17:54:09,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-25 17:54:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 263. [2021-11-25 17:54:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 260 states have (on average 1.2423076923076923) internal successors, (323), 262 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 323 transitions. [2021-11-25 17:54:09,726 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 323 transitions. Word has length 40 [2021-11-25 17:54:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:09,727 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 323 transitions. [2021-11-25 17:54:09,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 323 transitions. [2021-11-25 17:54:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 17:54:09,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:09,728 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:09,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:09,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:10,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-25 17:54:10,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:10,342 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:54:10,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:10,342 INFO L85 PathProgramCache]: Analyzing trace with hash -541356387, now seen corresponding path program 2 times [2021-11-25 17:54:10,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:54:10,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654534322] [2021-11-25 17:54:10,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:10,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:54:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:54:10,345 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:54:10,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-25 17:54:10,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:10,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:10,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:54:10,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:10,469 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 8 treesize of output 7 [2021-11-25 17:54:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:11,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:14,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:54:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654534322] [2021-11-25 17:54:14,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654534322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [766235330] [2021-11-25 17:54:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:14,374 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:54:14,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:54:14,380 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:54:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-25 17:54:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:54:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:15,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:54:15,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:54:16,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [766235330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:16,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605367147] [2021-11-25 17:54:16,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:16,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:16,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:16,377 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:16,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-25 17:54:16,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:16,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:54:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:16,478 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 8 treesize of output 7 [2021-11-25 17:54:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:17,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:20,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605367147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:20,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:54:20,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-25 17:54:20,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055551712] [2021-11-25 17:54:20,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:20,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:54:20,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:54:20,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:54:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:54:20,541 INFO L87 Difference]: Start difference. First operand 263 states and 323 transitions. Second operand has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:26,292 INFO L93 Difference]: Finished difference Result 335 states and 406 transitions. [2021-11-25 17:54:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-25 17:54:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 40 [2021-11-25 17:54:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:26,296 INFO L225 Difference]: With dead ends: 335 [2021-11-25 17:54:26,296 INFO L226 Difference]: Without dead ends: 331 [2021-11-25 17:54:26,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 17:54:26,299 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 151 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:26,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 534 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 325 Invalid, 0 Unknown, 28 Unchecked, 1.5s Time] [2021-11-25 17:54:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-25 17:54:26,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 299. [2021-11-25 17:54:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 296 states have (on average 1.2364864864864864) internal successors, (366), 298 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:26,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 366 transitions. [2021-11-25 17:54:26,308 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 366 transitions. Word has length 40 [2021-11-25 17:54:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:26,308 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 366 transitions. [2021-11-25 17:54:26,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:26,309 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 366 transitions. [2021-11-25 17:54:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-25 17:54:26,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:26,310 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:26,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:26,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:26,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-25 17:54:26,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:54:26,938 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:54:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:26,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1151440477, now seen corresponding path program 2 times [2021-11-25 17:54:26,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:54:26,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254704103] [2021-11-25 17:54:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:26,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:54:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:54:26,940 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:54:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-25 17:54:27,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:54:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:27,104 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 8 treesize of output 7 [2021-11-25 17:54:27,979 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:27,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:31,792 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:54:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254704103] [2021-11-25 17:54:31,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254704103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:31,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609912004] [2021-11-25 17:54:31,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:31,793 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:54:31,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:54:31,801 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:54:31,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-25 17:54:31,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:31,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 17:54:31,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:54:32,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 17:54:34,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609912004] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:34,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391743730] [2021-11-25 17:54:34,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-25 17:54:34,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:34,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:34,189 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:34,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-25 17:54:34,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-25 17:54:34,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:34,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 17:54:34,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:34,300 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 8 treesize of output 7 [2021-11-25 17:54:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:38,938 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:54:38,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391743730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:38,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:54:38,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-25 17:54:38,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145334222] [2021-11-25 17:54:38,938 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:54:38,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-25 17:54:38,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:54:38,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-25 17:54:38,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 17:54:38,941 INFO L87 Difference]: Start difference. First operand 299 states and 366 transitions. Second operand has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:45,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:45,221 INFO L93 Difference]: Finished difference Result 379 states and 457 transitions. [2021-11-25 17:54:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 17:54:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 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 40 [2021-11-25 17:54:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:45,224 INFO L225 Difference]: With dead ends: 379 [2021-11-25 17:54:45,225 INFO L226 Difference]: Without dead ends: 375 [2021-11-25 17:54:45,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=441, Invalid=3465, Unknown=0, NotChecked=0, Total=3906 [2021-11-25 17:54:45,227 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:45,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 634 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 393 Invalid, 0 Unknown, 33 Unchecked, 1.8s Time] [2021-11-25 17:54:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-25 17:54:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 341. [2021-11-25 17:54:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 338 states have (on average 1.227810650887574) internal successors, (415), 340 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 415 transitions. [2021-11-25 17:54:45,237 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 415 transitions. Word has length 40 [2021-11-25 17:54:45,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:45,238 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 415 transitions. [2021-11-25 17:54:45,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9375) internal successors, (189), 48 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:45,238 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 415 transitions. [2021-11-25 17:54:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-25 17:54:45,239 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:45,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:45,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-11-25 17:54:45,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-11-25 17:54:45,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:45,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 17:54:45,854 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:54:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash 599848030, now seen corresponding path program 1 times [2021-11-25 17:54:45,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:54:45,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640753926] [2021-11-25 17:54:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:54:45,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:54:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:54:45,856 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:54:45,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2021-11-25 17:54:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:54:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 17:54:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 17:54:46,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:54:46,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:54:46,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640753926] [2021-11-25 17:54:46,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [640753926] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:54:46,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:54:46,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:54:46,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705844286] [2021-11-25 17:54:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:54:46,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:54:46,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:54:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:54:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:54:46,270 INFO L87 Difference]: Start difference. First operand 341 states and 415 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:54:46,276 INFO L93 Difference]: Finished difference Result 340 states and 414 transitions. [2021-11-25 17:54:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 17:54:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-25 17:54:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:54:46,278 INFO L225 Difference]: With dead ends: 340 [2021-11-25 17:54:46,278 INFO L226 Difference]: Without dead ends: 338 [2021-11-25 17:54:46,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:54:46,279 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 17:54:46,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-25 17:54:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-25 17:54:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 255. [2021-11-25 17:54:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 253 states have (on average 1.2134387351778657) internal successors, (307), 254 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:46,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 307 transitions. [2021-11-25 17:54:46,288 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 307 transitions. Word has length 41 [2021-11-25 17:54:46,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:54:46,289 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 307 transitions. [2021-11-25 17:54:46,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:54:46,289 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 307 transitions. [2021-11-25 17:54:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 17:54:46,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:54:46,291 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:54:46,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2021-11-25 17:54:46,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:54:46,505 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:54:46,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:54:46,506 INFO L85 PathProgramCache]: Analyzing trace with hash 121982368, now seen corresponding path program 3 times [2021-11-25 17:54:46,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:54:46,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2654910] [2021-11-25 17:54:46,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:54:46,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:54:46,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:54:46,507 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:54:46,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-25 17:54:46,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 17:54:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:46,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-25 17:54:46,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:46,678 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 8 treesize of output 7 [2021-11-25 17:54:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:54:47,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 17:54:49,949 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:54:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2654910] [2021-11-25 17:54:49,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2654910] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:49,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1412436261] [2021-11-25 17:54:49,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:54:49,950 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:54:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:54:49,950 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:54:49,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-25 17:54:50,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 17:54:50,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:50,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 17:54:50,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:50,551 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 8 treesize of output 7 [2021-11-25 17:54:51,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 17:54:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:51,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:54:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 17:54:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1412436261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:54:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603987563] [2021-11-25 17:54:58,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:54:58,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:54:58,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:54:58,092 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:54:58,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-25 17:54:58,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 17:54:58,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:54:58,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 17:54:58,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:54:58,291 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 8 treesize of output 7 [2021-11-25 17:54:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:54:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:55:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603987563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:00,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:55:00,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14, 15, 9, 9] total 42 [2021-11-25 17:55:00,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903768606] [2021-11-25 17:55:00,343 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:55:00,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-25 17:55:00,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:55:00,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-25 17:55:00,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 17:55:00,346 INFO L87 Difference]: Start difference. First operand 255 states and 307 transitions. Second operand has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:13,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:55:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:55:20,175 INFO L93 Difference]: Finished difference Result 513 states and 602 transitions. [2021-11-25 17:55:20,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-25 17:55:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 0 states have call successors, (0), 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 44 [2021-11-25 17:55:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:55:20,177 INFO L225 Difference]: With dead ends: 513 [2021-11-25 17:55:20,177 INFO L226 Difference]: Without dead ends: 325 [2021-11-25 17:55:20,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 221 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1130, Invalid=4722, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 17:55:20,179 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 1625 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:55:20,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1625 Valid, 1123 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1233 Invalid, 1 Unknown, 84 Unchecked, 6.9s Time] [2021-11-25 17:55:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-25 17:55:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 197. [2021-11-25 17:55:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 195 states have (on average 1.1794871794871795) internal successors, (230), 196 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 230 transitions. [2021-11-25 17:55:20,185 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 230 transitions. Word has length 44 [2021-11-25 17:55:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:55:20,185 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 230 transitions. [2021-11-25 17:55:20,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.857142857142857) internal successors, (162), 42 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:55:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 230 transitions. [2021-11-25 17:55:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 17:55:20,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:55:20,187 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-25 17:55:20,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-25 17:55:20,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2021-11-25 17:55:20,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-25 17:55:20,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:55:20,799 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:55:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:55:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-25 17:55:20,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:55:20,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890121851] [2021-11-25 17:55:20,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:55:20,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:55:20,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:55:20,802 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:55:20,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-25 17:55:20,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:55:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:55:20,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 17:55:20,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:20,955 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 8 treesize of output 7 [2021-11-25 17:55:22,454 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:22,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:32,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 17:55:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890121851] [2021-11-25 17:55:32,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890121851] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:32,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [469063302] [2021-11-25 17:55:32,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:55:32,692 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 17:55:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 17:55:32,693 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 17:55:32,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2021-11-25 17:55:32,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:55:32,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:55:32,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 17:55:32,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:32,994 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 8 treesize of output 7 [2021-11-25 17:55:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:34,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:55:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [469063302] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:55:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415209804] [2021-11-25 17:55:43,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 17:55:43,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:55:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:55:43,408 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:55:43,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-25 17:55:43,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 17:55:43,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:55:43,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 17:55:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:55:43,573 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 8 treesize of output 7 [2021-11-25 17:55:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:55:45,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 17:56:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:56:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415209804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 17:56:08,126 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 17:56:08,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-25 17:56:08,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146238904] [2021-11-25 17:56:08,127 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 17:56:08,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-25 17:56:08,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 17:56:08,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-25 17:56:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-25 17:56:08,133 INFO L87 Difference]: Start difference. First operand 197 states and 230 transitions. Second operand has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:56:19,878 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:22,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:24,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:26,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:28,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:30,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:32,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:34,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:36,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:42,329 WARN L227 SmtUtils]: Spent 5.64s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 17:56:50,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:52,302 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:54,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:56,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:56:58,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:00,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:02,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:04,405 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:16,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:18,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:20,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:22,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:24,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:26,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:28,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:39,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:41,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:43,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:45,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:47,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:49,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:57:50,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:01,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:03,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:05,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:07,354 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:09,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:11,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:21,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:22,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:24,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:26,811 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:28,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:30,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:39,842 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:41,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:43,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:45,713 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:47,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:55,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:57,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:58:59,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:01,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:08,446 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:09,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:11,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:18,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:19,890 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:21,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:27,338 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:28,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 17:59:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:59:39,674 INFO L93 Difference]: Finished difference Result 3641 states and 4236 transitions. [2021-11-25 17:59:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 17:59:39,676 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 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 [2021-11-25 17:59:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:59:39,687 INFO L225 Difference]: With dead ends: 3641 [2021-11-25 17:59:39,688 INFO L226 Difference]: Without dead ends: 3641 [2021-11-25 17:59:39,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 114.7s TimeCoverageRelationStatistics Valid=5451, Invalid=14289, Unknown=0, NotChecked=0, Total=19740 [2021-11-25 17:59:39,690 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 7740 mSDsluCounter, 4045 mSDsCounter, 0 mSdLazyCounter, 4743 mSolverCounterSat, 219 mSolverCounterUnsat, 48 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7740 SdHoareTripleChecker+Valid, 4184 SdHoareTripleChecker+Invalid, 5175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 4743 IncrementalHoareTripleChecker+Invalid, 48 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 131.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:59:39,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7740 Valid, 4184 Invalid, 5175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 4743 Invalid, 48 Unknown, 165 Unchecked, 131.1s Time] [2021-11-25 17:59:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3641 states. [2021-11-25 17:59:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3641 to 261. [2021-11-25 17:59:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.196911196911197) internal successors, (310), 260 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 310 transitions. [2021-11-25 17:59:39,714 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 310 transitions. Word has length 66 [2021-11-25 17:59:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:59:39,715 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 310 transitions. [2021-11-25 17:59:39,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 17:59:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 310 transitions. [2021-11-25 17:59:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-25 17:59:39,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:59:39,716 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:59:39,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:39,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:40,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-25 17:59:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 [2021-11-25 17:59:40,320 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 17:59:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:59:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash 324648416, now seen corresponding path program 3 times [2021-11-25 17:59:40,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 17:59:40,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000010038] [2021-11-25 17:59:40,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 17:59:40,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 17:59:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 17:59:40,321 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 17:59:40,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2021-11-25 17:59:40,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 17:59:40,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 17:59:40,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-25 17:59:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:59:40,685 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 8 treesize of output 7 [2021-11-25 17:59:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 74 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 17:59:43,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:00:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:00:28,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:00:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000010038] [2021-11-25 18:00:28,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000010038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:00:28,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854967294] [2021-11-25 18:00:28,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:00:28,853 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:00:28,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:00:28,854 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:00:28,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2021-11-25 18:00:31,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:00:31,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:00:31,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-25 18:00:31,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:00:31,947 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 8 treesize of output 7 [2021-11-25 18:00:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 126 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:00:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:02:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:02:13,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854967294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:02:13,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808460107] [2021-11-25 18:02:13,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:02:13,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:02:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:02:13,773 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:02:13,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-25 18:02:14,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:02:14,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:02:14,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-25 18:02:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:02:14,214 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 8 treesize of output 7 [2021-11-25 18:02:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 104 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:02:24,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:03:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:03:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808460107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:03:39,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:03:39,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 21, 21, 19] total 82 [2021-11-25 18:03:39,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118858856] [2021-11-25 18:03:39,026 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:03:39,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-25 18:03:39,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:03:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-25 18:03:39,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=5826, Unknown=22, NotChecked=0, Total=6642 [2021-11-25 18:03:39,028 INFO L87 Difference]: Start difference. First operand 261 states and 310 transitions. Second operand has 82 states, 82 states have (on average 3.3902439024390243) internal successors, (278), 82 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:03:47,680 INFO L93 Difference]: Finished difference Result 296 states and 352 transitions. [2021-11-25 18:03:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:03:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.3902439024390243) internal successors, (278), 82 states have internal predecessors, (278), 0 states have call successors, (0), 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 [2021-11-25 18:03:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:03:47,683 INFO L225 Difference]: With dead ends: 296 [2021-11-25 18:03:47,683 INFO L226 Difference]: Without dead ends: 293 [2021-11-25 18:03:47,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 302 SyntacticMatches, 13 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4021 ImplicationChecksByTransitivity, 157.3s TimeCoverageRelationStatistics Valid=872, Invalid=6245, Unknown=23, NotChecked=0, Total=7140 [2021-11-25 18:03:47,684 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:03:47,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 690 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 177 Invalid, 0 Unknown, 213 Unchecked, 2.8s Time] [2021-11-25 18:03:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-25 18:03:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 285. [2021-11-25 18:03:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 283 states have (on average 1.204946996466431) internal successors, (341), 284 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 341 transitions. [2021-11-25 18:03:47,690 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 341 transitions. Word has length 66 [2021-11-25 18:03:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:03:47,691 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 341 transitions. [2021-11-25 18:03:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.3902439024390243) internal successors, (278), 82 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:03:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 341 transitions. [2021-11-25 18:03:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 18:03:47,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:03:47,692 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:03:47,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (58)] Ended with exit code 0 [2021-11-25 18:03:47,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-25 18:03:48,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2021-11-25 18:03:48,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:03:48,306 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 18:03:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:03:48,307 INFO L85 PathProgramCache]: Analyzing trace with hash 578637987, now seen corresponding path program 4 times [2021-11-25 18:03:48,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:03:48,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782437123] [2021-11-25 18:03:48,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:03:48,307 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:03:48,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:03:48,308 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:03:48,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2021-11-25 18:03:48,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:03:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:03:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-25 18:03:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:03:48,503 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 8 treesize of output 7 [2021-11-25 18:03:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 64 proven. 115 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:03:51,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:04:04,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782437123] [2021-11-25 18:04:04,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782437123] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:04,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004928168] [2021-11-25 18:04:04,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:04,060 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:04:04,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:04:04,062 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:04:04,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2021-11-25 18:04:04,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:04,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:04,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 18:04:04,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:08,904 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:04:08,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:04:14,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1004928168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:14,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296683291] [2021-11-25 18:04:14,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:14,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:14,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:04:14,895 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:04:14,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-25 18:04:15,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:04:15,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:15,062 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 8 treesize of output 7 [2021-11-25 18:04:15,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 18:04:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:04:19,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 18:04:24,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296683291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:24,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:04:24,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17, 16, 19, 17] total 80 [2021-11-25 18:04:24,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433081307] [2021-11-25 18:04:24,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:04:24,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-25 18:04:24,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:04:24,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-25 18:04:24,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=5834, Unknown=0, NotChecked=0, Total=6320 [2021-11-25 18:04:24,677 INFO L87 Difference]: Start difference. First operand 285 states and 341 transitions. Second operand has 80 states, 80 states have (on average 3.7625) internal successors, (301), 80 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:04:43,645 INFO L93 Difference]: Finished difference Result 342 states and 407 transitions. [2021-11-25 18:04:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 18:04:43,647 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.7625) internal successors, (301), 80 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-25 18:04:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:04:43,649 INFO L225 Difference]: With dead ends: 342 [2021-11-25 18:04:43,649 INFO L226 Difference]: Without dead ends: 340 [2021-11-25 18:04:43,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 346 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=936, Invalid=9570, Unknown=0, NotChecked=0, Total=10506 [2021-11-25 18:04:43,651 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 224 mSDsluCounter, 1890 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:04:43,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 1941 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 979 Invalid, 0 Unknown, 97 Unchecked, 5.4s Time] [2021-11-25 18:04:43,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-25 18:04:43,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 315. [2021-11-25 18:04:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 313 states have (on average 1.2140575079872205) internal successors, (380), 314 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 380 transitions. [2021-11-25 18:04:43,670 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 380 transitions. Word has length 70 [2021-11-25 18:04:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:04:43,670 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 380 transitions. [2021-11-25 18:04:43,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.7625) internal successors, (301), 80 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:04:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 380 transitions. [2021-11-25 18:04:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 18:04:43,672 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:04:43,672 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:04:43,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:43,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2021-11-25 18:04:44,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-25 18:04:44,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:04:44,276 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 18:04:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:04:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1448579315, now seen corresponding path program 4 times [2021-11-25 18:04:44,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:04:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684062738] [2021-11-25 18:04:44,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:44,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:04:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:04:44,281 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:04:44,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2021-11-25 18:04:44,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:44,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:04:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:04:44,465 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 8 treesize of output 7 [2021-11-25 18:04:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 59 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 18:04:47,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:04:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:04:59,476 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-25 18:04:59,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684062738] [2021-11-25 18:04:59,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684062738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:04:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [799504330] [2021-11-25 18:04:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:04:59,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-25 18:04:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 [2021-11-25 18:04:59,479 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-25 18:04:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2021-11-25 18:04:59,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:04:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:04:59,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 18:04:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 85 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 18:05:03,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 85 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 18:05:08,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [799504330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:08,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279989343] [2021-11-25 18:05:08,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:05:08,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:05:08,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:05:08,649 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:05:08,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-25 18:05:08,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:05:08,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:08,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 18:05:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:08,813 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 8 treesize of output 7 [2021-11-25 18:05:09,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-25 18:05:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 71 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:05:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:05:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 71 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 18:05:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279989343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:05:16,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-25 18:05:16,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 14, 17, 16] total 69 [2021-11-25 18:05:16,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551731022] [2021-11-25 18:05:16,298 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-25 18:05:16,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-25 18:05:16,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-25 18:05:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-25 18:05:16,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=4255, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 18:05:16,300 INFO L87 Difference]: Start difference. First operand 315 states and 380 transitions. Second operand has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:38,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:05:38,770 INFO L93 Difference]: Finished difference Result 392 states and 461 transitions. [2021-11-25 18:05:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 18:05:38,773 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 0 states have call successors, (0), 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 72 [2021-11-25 18:05:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:05:38,775 INFO L225 Difference]: With dead ends: 392 [2021-11-25 18:05:38,775 INFO L226 Difference]: Without dead ends: 354 [2021-11-25 18:05:38,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 368 SyntacticMatches, 7 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=840, Invalid=7902, Unknown=0, NotChecked=0, Total=8742 [2021-11-25 18:05:38,777 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 255 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:05:38,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1077 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 716 Invalid, 0 Unknown, 10 Unchecked, 5.5s Time] [2021-11-25 18:05:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-25 18:05:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 319. [2021-11-25 18:05:38,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 317 states have (on average 1.2050473186119874) internal successors, (382), 318 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 382 transitions. [2021-11-25 18:05:38,784 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 382 transitions. Word has length 72 [2021-11-25 18:05:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:05:38,785 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 382 transitions. [2021-11-25 18:05:38,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.0144927536231885) internal successors, (277), 69 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:05:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 382 transitions. [2021-11-25 18:05:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 18:05:38,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:05:38,786 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:05:38,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-25 18:05:39,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (64)] Ended with exit code 0 [2021-11-25 18:05:39,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2021-11-25 18:05:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/cvc4 --incremental --print-success --lang smt [2021-11-25 18:05:39,414 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-25 18:05:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:05:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash -284637005, now seen corresponding path program 3 times [2021-11-25 18:05:39,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-25 18:05:39,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508993466] [2021-11-25 18:05:39,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:05:39,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-25 18:05:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat [2021-11-25 18:05:39,416 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-25 18:05:39,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29f48c1e-31b5-4d0a-80bd-42b8fd23607f/bin/utaipan-eEHZpOm5b7/mathsat -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2021-11-25 18:05:39,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-25 18:05:39,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:05:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-25 18:05:39,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:05:39,716 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 8 treesize of output 7