./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 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P --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 0.2.1-dev-53f42b1 [2021-11-21 01:48:34,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:48:34,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:48:34,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:48:34,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:48:34,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:48:34,979 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:48:34,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:48:34,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:48:34,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:48:34,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:48:34,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:48:34,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:48:34,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:48:34,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:48:35,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:48:35,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:48:35,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:48:35,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:48:35,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:48:35,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:48:35,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:48:35,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:48:35,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:48:35,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:48:35,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:48:35,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:48:35,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:48:35,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:48:35,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:48:35,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:48:35,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:48:35,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:48:35,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:48:35,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:48:35,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:48:35,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:48:35,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:48:35,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:48:35,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:48:35,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:48:35,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-21 01:48:35,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:48:35,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:48:35,105 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:48:35,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:48:35,106 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:48:35,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:48:35,106 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:48:35,106 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:48:35,107 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:48:35,107 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:48:35,108 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:48:35,108 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:48:35,108 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:48:35,108 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:48:35,109 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:48:35,109 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:48:35,109 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:48:35,109 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:48:35,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:48:35,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:48:35,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:48:35,111 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:48:35,112 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:48:35,112 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:48:35,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:48:35,112 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:48:35,113 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:48:35,113 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:48:35,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:48:35,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:48:35,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:35,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:48:35,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:48:35,114 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:48:35,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:48:35,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:48:35,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:48:35,116 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_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-21 01:48:35,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:48:35,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:48:35,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:48:35,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:48:35,432 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:48:35,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-21 01:48:35,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/757260ffb/3a1ac4e1eaba400c8bf6f0fb8cf44402/FLAG813b89fa8 [2021-11-21 01:48:35,984 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:48:35,984 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-21 01:48:36,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/757260ffb/3a1ac4e1eaba400c8bf6f0fb8cf44402/FLAG813b89fa8 [2021-11-21 01:48:36,311 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/757260ffb/3a1ac4e1eaba400c8bf6f0fb8cf44402 [2021-11-21 01:48:36,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:48:36,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:48:36,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:36,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:48:36,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:48:36,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:36" (1/1) ... [2021-11-21 01:48:36,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@736a13a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:36, skipping insertion in model container [2021-11-21 01:48:36,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:36" (1/1) ... [2021-11-21 01:48:36,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:48:36,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:48:36,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:36,677 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) [2021-11-21 01:48:36,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4ac1f808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:36, skipping insertion in model container [2021-11-21 01:48:36,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:36,678 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-21 01:48:36,680 INFO L158 Benchmark]: Toolchain (without parser) took 364.40ms. Allocated memory is still 113.2MB. Free memory was 74.9MB in the beginning and 88.1MB in the end (delta: -13.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:48:36,681 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-21 01:48:36,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.90ms. Allocated memory is still 113.2MB. Free memory was 74.6MB in the beginning and 88.1MB in the end (delta: -13.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-21 01:48:36,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.90ms. Allocated memory is still 113.2MB. Free memory was 74.6MB in the beginning and 88.1MB in the end (delta: -13.4MB). 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_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P --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 0.2.1-dev-53f42b1 [2021-11-21 01:48:38,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:48:38,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:48:38,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:48:38,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:48:38,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:48:38,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:48:38,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:48:38,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:48:38,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:48:38,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:48:38,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:48:38,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:48:38,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:48:38,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:48:38,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:48:38,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:48:38,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:48:38,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:48:38,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:48:38,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:48:38,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:48:38,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:48:38,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:48:39,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:48:39,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:48:39,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:48:39,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:48:39,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:48:39,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:48:39,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:48:39,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:48:39,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:48:39,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:48:39,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:48:39,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:48:39,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:48:39,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:48:39,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:48:39,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:48:39,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:48:39,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-21 01:48:39,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:48:39,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:48:39,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:48:39,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:48:39,077 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:48:39,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:48:39,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:48:39,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:48:39,078 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:48:39,078 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:48:39,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:48:39,079 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:48:39,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-21 01:48:39,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-21 01:48:39,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:48:39,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:48:39,081 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:48:39,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:48:39,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:48:39,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:48:39,082 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-21 01:48:39,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-21 01:48:39,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-21 01:48:39,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:48:39,083 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-21 01:48:39,083 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-21 01:48:39,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-21 01:48:39,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:48:39,084 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:48:39,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:48:39,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-21 01:48:39,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:48:39,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:39,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:48:39,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:48:39,086 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-21 01:48:39,086 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:39,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:48:39,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:48:39,087 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_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6376f52a263bde0c709cb35a0d040626ae764c5527f8161f54a95df7802768d2 [2021-11-21 01:48:39,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:48:39,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:48:39,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:48:39,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:48:39,481 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:48:39,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-21 01:48:39,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/a899ea147/e6cdcbabe73648b7b6facea9aeb6eec8/FLAG511f73fe2 [2021-11-21 01:48:40,145 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:48:40,146 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/sv-benchmarks/c/array-memsafety/array02-alloca-2.i [2021-11-21 01:48:40,173 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/a899ea147/e6cdcbabe73648b7b6facea9aeb6eec8/FLAG511f73fe2 [2021-11-21 01:48:40,398 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/data/a899ea147/e6cdcbabe73648b7b6facea9aeb6eec8 [2021-11-21 01:48:40,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:48:40,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:48:40,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:40,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:48:40,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:48:40,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:40,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344bf1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40, skipping insertion in model container [2021-11-21 01:48:40,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:40,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:48:40,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:48:40,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:40,736 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-21 01:48:40,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:48:40,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:40,814 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:48:40,875 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:48:40,913 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:48:40,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40 WrapperNode [2021-11-21 01:48:40,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:48:40,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:40,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:48:40,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:48:40,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:40,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:40,988 INFO L137 Inliner]: procedures = 117, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2021-11-21 01:48:40,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:48:40,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:48:40,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:48:40,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:48:40,999 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:40,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:48:41,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:48:41,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:48:41,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:48:41,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (1/1) ... [2021-11-21 01:48:41,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:48:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:41,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:48:41,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:48:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-21 01:48:41,122 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:48:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:48:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-21 01:48:41,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:48:41,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:48:41,266 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:48:41,268 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:48:41,698 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:48:41,704 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:48:41,704 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-21 01:48:41,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:41 BoogieIcfgContainer [2021-11-21 01:48:41,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:48:41,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:48:41,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:48:41,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:48:41,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:48:40" (1/3) ... [2021-11-21 01:48:41,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797df83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:41, skipping insertion in model container [2021-11-21 01:48:41,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:48:40" (2/3) ... [2021-11-21 01:48:41,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@797df83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:48:41, skipping insertion in model container [2021-11-21 01:48:41,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:48:41" (3/3) ... [2021-11-21 01:48:41,720 INFO L111 eAbstractionObserver]: Analyzing ICFG array02-alloca-2.i [2021-11-21 01:48:41,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:48:41,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-21 01:48:41,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:48:41,792 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 [2021-11-21 01:48:41,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-21 01:48:41,823 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) [2021-11-21 01:48:41,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:48:41,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:41,830 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:48:41,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:41,836 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-21 01:48:41,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:41,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413881389] [2021-11-21 01:48:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:41,849 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:41,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:41,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:41,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-21 01:48:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:48:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:42,032 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 [2021-11-21 01:48:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:42,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:42,112 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:42,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413881389] [2021-11-21 01:48:42,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413881389] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:42,113 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:42,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-21 01:48:42,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662687509] [2021-11-21 01:48:42,116 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:42,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:48:42,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:48:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:48:42,159 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) [2021-11-21 01:48:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:42,311 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-11-21 01:48:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:48:42,314 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 [2021-11-21 01:48:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:42,324 INFO L225 Difference]: With dead ends: 41 [2021-11-21 01:48:42,324 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:48:42,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:48:42,331 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 [2021-11-21 01:48:42,336 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] [2021-11-21 01:48:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:48:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-21 01:48:42,373 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) [2021-11-21 01:48:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2021-11-21 01:48:42,376 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 6 [2021-11-21 01:48:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2021-11-21 01:48:42,378 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) [2021-11-21 01:48:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2021-11-21 01:48:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:48:42,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:42,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:48:42,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:48:42,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-21 01:48:42,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362116297] [2021-11-21 01:48:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:42,597 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:42,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:42,599 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:42,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-21 01:48:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:48:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:42,694 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 [2021-11-21 01:48:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:42,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:42,948 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:42,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362116297] [2021-11-21 01:48:42,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362116297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:42,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:42,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-21 01:48:42,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580163754] [2021-11-21 01:48:42,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:42,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:48:42,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:48:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:48:42,951 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:43,838 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-11-21 01:48:43,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:48:43,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-21 01:48:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:43,842 INFO L225 Difference]: With dead ends: 111 [2021-11-21 01:48:43,842 INFO L226 Difference]: Without dead ends: 111 [2021-11-21 01:48:43,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:48:43,844 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 153 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:43,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 122 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 01:48:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-21 01:48:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 43. [2021-11-21 01:48:43,852 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) [2021-11-21 01:48:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-21 01:48:43,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 6 [2021-11-21 01:48:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:43,854 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-21 01:48:43,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:43,854 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-21 01:48:43,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:48:43,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:43,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:43,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-21 01:48:44,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:48:44,059 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-21 01:48:44,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:44,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029188212] [2021-11-21 01:48:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:44,063 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:44,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:44,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:44,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-21 01:48:44,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:48:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:44,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 01:48:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:44,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:44,199 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:44,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029188212] [2021-11-21 01:48:44,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029188212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:44,200 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:44,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-21 01:48:44,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890128873] [2021-11-21 01:48:44,201 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:44,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:48:44,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:48:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:48:44,202 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) [2021-11-21 01:48:44,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:44,377 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-11-21 01:48:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:48:44,378 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 [2021-11-21 01:48:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:44,379 INFO L225 Difference]: With dead ends: 37 [2021-11-21 01:48:44,379 INFO L226 Difference]: Without dead ends: 37 [2021-11-21 01:48:44,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:48:44,381 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-11-21 01:48:44,382 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] [2021-11-21 01:48:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-21 01:48:44,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-21 01:48:44,386 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) [2021-11-21 01:48:44,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2021-11-21 01:48:44,387 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 8 [2021-11-21 01:48:44,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:44,388 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2021-11-21 01:48:44,388 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) [2021-11-21 01:48:44,388 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2021-11-21 01:48:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:48:44,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:44,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:44,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:44,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:48:44,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-21 01:48:44,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:44,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809265680] [2021-11-21 01:48:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:44,603 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:44,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:44,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-21 01:48:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:44,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:48:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:44,726 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 [2021-11-21 01:48:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:44,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:45,184 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809265680] [2021-11-21 01:48:45,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809265680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:45,184 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:45,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-21 01:48:45,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368850362] [2021-11-21 01:48:45,185 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:45,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:48:45,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:48:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:48:45,187 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:45,667 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2021-11-21 01:48:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:48:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:48:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:45,669 INFO L225 Difference]: With dead ends: 39 [2021-11-21 01:48:45,669 INFO L226 Difference]: Without dead ends: 39 [2021-11-21 01:48:45,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:48:45,671 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 124 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:45,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 38 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:48:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-21 01:48:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-11-21 01:48:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-11-21 01:48:45,676 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 8 [2021-11-21 01:48:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:45,677 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-11-21 01:48:45,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-11-21 01:48:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:48:45,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:45,678 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:45,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-21 01:48:45,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:48:45,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:45,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-21 01:48:45,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:45,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191427908] [2021-11-21 01:48:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:45,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:45,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:45,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:45,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-21 01:48:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:48:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191427908] [2021-11-21 01:48:46,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191427908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:46,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [579052977] [2021-11-21 01:48:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:46,156 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:46,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:48:46,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:48:46,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-21 01:48:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:48:46,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [579052977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:46,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357916366] [2021-11-21 01:48:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:46,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:46,416 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:46,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:48:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:46,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:48:46,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:46,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357916366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:46,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:48:46,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:48:46,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996106455] [2021-11-21 01:48:46,596 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:48:46,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:48:46,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:46,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:48:46,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:48:46,598 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2021-11-21 01:48:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:46,685 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2021-11-21 01:48:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:48:46,686 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 [2021-11-21 01:48:46,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:46,687 INFO L225 Difference]: With dead ends: 59 [2021-11-21 01:48:46,687 INFO L226 Difference]: Without dead ends: 59 [2021-11-21 01:48:46,687 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 [2021-11-21 01:48:46,689 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 69 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:46,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 121 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:48:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-21 01:48:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2021-11-21 01:48:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 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) [2021-11-21 01:48:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-11-21 01:48:46,696 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 10 [2021-11-21 01:48:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:46,697 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-11-21 01:48:46,697 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) [2021-11-21 01:48:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-11-21 01:48:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:48:46,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:46,698 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:46,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:46,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:47,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:47,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:47,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-21 01:48:47,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561389777] [2021-11-21 01:48:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:47,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:47,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:47,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:47,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-21 01:48:47,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:48:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:47,406 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 [2021-11-21 01:48:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:47,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:48,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:48,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561389777] [2021-11-21 01:48:48,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561389777] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:48,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219952262] [2021-11-21 01:48:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:48,481 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:48:48,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:48:48,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-21 01:48:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:48,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:48:48,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:48,677 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 [2021-11-21 01:48:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:48,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:49,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [219952262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324220516] [2021-11-21 01:48:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:49,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:49,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:49,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:49,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:48:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:49,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:48:49,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:49,303 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 [2021-11-21 01:48:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:49,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:49,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324220516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:49,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:48:49,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-21 01:48:49,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100669439] [2021-11-21 01:48:49,811 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:48:49,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 01:48:49,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:49,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 01:48:49,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:48:49,813 INFO L87 Difference]: Start difference. First operand 38 states and 43 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) [2021-11-21 01:48:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:50,427 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-11-21 01:48:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:48:50,430 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 [2021-11-21 01:48:50,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:50,430 INFO L225 Difference]: With dead ends: 67 [2021-11-21 01:48:50,431 INFO L226 Difference]: Without dead ends: 67 [2021-11-21 01:48:50,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-21 01:48:50,432 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 99 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:50,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 119 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2021-11-21 01:48:50,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-21 01:48:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2021-11-21 01:48:50,438 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) [2021-11-21 01:48:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-11-21 01:48:50,440 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 10 [2021-11-21 01:48:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:50,440 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-11-21 01:48:50,440 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) [2021-11-21 01:48:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-11-21 01:48:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:48:50,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:50,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:50,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:50,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:50,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:51,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:51,055 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:51,056 INFO L85 PathProgramCache]: Analyzing trace with hash 363893421, now seen corresponding path program 1 times [2021-11-21 01:48:51,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:51,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134707032] [2021-11-21 01:48:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:51,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:51,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:51,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-21 01:48:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:48:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:51,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:51,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134707032] [2021-11-21 01:48:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134707032] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:48:51,223 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:48:51,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:48:51,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752946844] [2021-11-21 01:48:51,223 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:48:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:48:51,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:48:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:48:51,225 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:51,537 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-21 01:48:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:48:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:48:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:51,540 INFO L225 Difference]: With dead ends: 80 [2021-11-21 01:48:51,540 INFO L226 Difference]: Without dead ends: 80 [2021-11-21 01:48:51,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:48:51,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 110 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:51,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 71 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:48:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-21 01:48:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2021-11-21 01:48:51,559 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) [2021-11-21 01:48:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-21 01:48:51,561 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 13 [2021-11-21 01:48:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:51,561 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-21 01:48:51,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:48:51,562 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-21 01:48:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:48:51,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:51,566 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:48:51,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:51,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:48:51,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:51,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2110205631, now seen corresponding path program 1 times [2021-11-21 01:48:51,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:51,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1665377762] [2021-11-21 01:48:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:51,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:51,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:51,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-21 01:48:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:51,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:48:51,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:51,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:52,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:52,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1665377762] [2021-11-21 01:48:52,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1665377762] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:52,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1628938453] [2021-11-21 01:48:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:52,082 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:52,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:48:52,083 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:48:52,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-21 01:48:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:52,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:48:52,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:52,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:52,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1628938453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:52,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833612504] [2021-11-21 01:48:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:48:52,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:52,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:52,352 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:52,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:48:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:48:52,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:48:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:52,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:48:52,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833612504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:52,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:48:52,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-21 01:48:52,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14525124] [2021-11-21 01:48:52,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:48:52,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:48:52,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:48:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:48:52,587 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) [2021-11-21 01:48:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:48:52,739 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-11-21 01:48:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:48:52,741 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 [2021-11-21 01:48:52,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:48:52,742 INFO L225 Difference]: With dead ends: 65 [2021-11-21 01:48:52,742 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:48:52,742 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 [2021-11-21 01:48:52,743 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:48:52,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 80 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:48:52,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:48:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-11-21 01:48:52,754 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) [2021-11-21 01:48:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-21 01:48:52,756 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2021-11-21 01:48:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:48:52,757 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-21 01:48:52,757 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) [2021-11-21 01:48:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-21 01:48:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:48:52,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:48:52,759 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-21 01:48:52,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:52,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:53,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:48:53,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:53,360 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:48:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:48:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-21 01:48:53,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:48:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143292381] [2021-11-21 01:48:53,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:48:53,362 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:48:53,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:48:53,363 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:48:53,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-21 01:48:53,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:48:53,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:48:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:48:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:53,461 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 [2021-11-21 01:48:53,934 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:53,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:55,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:48:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143292381] [2021-11-21 01:48:55,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143292381] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:55,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614503428] [2021-11-21 01:48:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:48:55,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:48:55,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:48:55,313 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:48:55,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-21 01:48:55,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:48:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:48:55,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-21 01:48:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:55,501 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 [2021-11-21 01:48:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:55,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:56,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:56,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614503428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120513096] [2021-11-21 01:48:56,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:48:56,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:48:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:48:56,550 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:48:56,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:48:56,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:48:56,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:48:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:48:56,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:48:56,660 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 [2021-11-21 01:48:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:57,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:48:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:48:58,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120513096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:48:58,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:48:58,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-21 01:48:58,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322632466] [2021-11-21 01:48:58,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:48:58,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 01:48:58,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:48:58,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 01:48:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:48:58,584 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) [2021-11-21 01:49:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:01,780 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2021-11-21 01:49:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 01:49:01,782 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 [2021-11-21 01:49:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:01,783 INFO L225 Difference]: With dead ends: 183 [2021-11-21 01:49:01,783 INFO L226 Difference]: Without dead ends: 183 [2021-11-21 01:49:01,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2021-11-21 01:49:01,785 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 535 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:01,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 440 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 364 Invalid, 0 Unknown, 48 Unchecked, 1.8s Time] [2021-11-21 01:49:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-21 01:49:01,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 78. [2021-11-21 01:49:01,791 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) [2021-11-21 01:49:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2021-11-21 01:49:01,792 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 18 [2021-11-21 01:49:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:01,793 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2021-11-21 01:49:01,793 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) [2021-11-21 01:49:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2021-11-21 01:49:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 01:49:01,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:01,794 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:01,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:02,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:02,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:02,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:02,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:49:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1163693311, now seen corresponding path program 1 times [2021-11-21 01:49:02,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:49:02,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1842693933] [2021-11-21 01:49:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:02,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:49:02,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:49:02,421 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:49:02,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-21 01:49:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:49:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:02,514 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 [2021-11-21 01:49:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:49:02,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:49:03,874 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:49:03,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1842693933] [2021-11-21 01:49:03,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1842693933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:03,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [962584542] [2021-11-21 01:49:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:03,874 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:49:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:49:03,875 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:49:03,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-21 01:49:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:49:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:04,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:04,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [962584542] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:04,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710150568] [2021-11-21 01:49:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:04,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:04,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:49:04,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:49:04,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-21 01:49:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:04,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:49:04,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:04,805 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 [2021-11-21 01:49:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:49:05,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:49:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710150568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:05,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:49:05,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 26 [2021-11-21 01:49:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787602560] [2021-11-21 01:49:05,868 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:49:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 01:49:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:49:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 01:49:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-21 01:49:05,870 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) [2021-11-21 01:49:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:08,076 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2021-11-21 01:49:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-21 01:49:08,078 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 [2021-11-21 01:49:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:08,081 INFO L225 Difference]: With dead ends: 136 [2021-11-21 01:49:08,081 INFO L226 Difference]: Without dead ends: 136 [2021-11-21 01:49:08,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:49:08,083 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 283 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:08,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 259 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 294 Invalid, 0 Unknown, 54 Unchecked, 0.9s Time] [2021-11-21 01:49:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-21 01:49:08,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2021-11-21 01:49:08,106 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) [2021-11-21 01:49:08,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-11-21 01:49:08,113 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 18 [2021-11-21 01:49:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:08,114 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-11-21 01:49:08,114 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) [2021-11-21 01:49:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-11-21 01:49:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 01:49:08,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:08,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:49:08,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:08,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:08,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-21 01:49:08,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:49:08,719 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)] === [2021-11-21 01:49:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:08,720 INFO L85 PathProgramCache]: Analyzing trace with hash -991865623, now seen corresponding path program 1 times [2021-11-21 01:49:08,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:49:08,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776487488] [2021-11-21 01:49:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:49:08,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:49:08,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:49:08,722 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:49:08,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-21 01:49:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:49:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:49:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:49:08,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:49:13,076 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:49:13,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776487488] [2021-11-21 01:49:13,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776487488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-21 01:49:13,076 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:49:13,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-21 01:49:13,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326409860] [2021-11-21 01:49:13,077 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-21 01:49:13,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:49:13,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:49:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:49:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 01:49:13,078 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:49:13,245 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2021-11-21 01:49:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:49:13,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 01:49:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:49:13,247 INFO L225 Difference]: With dead ends: 105 [2021-11-21 01:49:13,248 INFO L226 Difference]: Without dead ends: 81 [2021-11-21 01:49:13,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-11-21 01:49:13,248 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:49:13,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 64 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2021-11-21 01:49:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-21 01:49:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-11-21 01:49:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 80 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2021-11-21 01:49:13,253 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 19 [2021-11-21 01:49:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:49:13,254 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2021-11-21 01:49:13,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.166666666666667) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:49:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2021-11-21 01:49:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:49:13,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:49:13,263 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-21 01:49:13,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-21 01:49:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:49:13,464 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:49:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:49:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-21 01:49:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:49:13,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358893856] [2021-11-21 01:49:13,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:49:13,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:49:13,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:49:13,466 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:49:13,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-21 01:49:13,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:49:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:49:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 01:49:13,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:13,652 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 [2021-11-21 01:49:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:14,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:16,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:49:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358893856] [2021-11-21 01:49:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358893856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:16,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245468942] [2021-11-21 01:49:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:49:16,855 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:49:16,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:49:16,859 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:49:16,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-21 01:49:17,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:49:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:49:17,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:49:17,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:17,204 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 [2021-11-21 01:49:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:18,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:25,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245468942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:25,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771655769] [2021-11-21 01:49:25,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:49:25,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:49:25,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:49:25,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:49:25,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-21 01:49:26,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-21 01:49:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:49:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:49:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:49:26,850 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 [2021-11-21 01:49:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:27,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:49:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:49:32,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771655769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:49:32,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:49:32,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2021-11-21 01:49:32,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438620597] [2021-11-21 01:49:32,663 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:49:32,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:49:32,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:49:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:49:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:49:32,666 INFO L87 Difference]: Start difference. First operand 81 states and 93 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) [2021-11-21 01:49:37,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:39,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:41,215 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:43,226 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:47,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:49,562 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:51,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:53,104 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:56,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:49:58,600 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:50:00,604 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:50:03,917 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:50:05,932 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:50:09,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:50:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:13,611 INFO L93 Difference]: Finished difference Result 665 states and 757 transitions. [2021-11-21 01:50:13,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 01:50:13,613 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 [2021-11-21 01:50:13,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:13,617 INFO L225 Difference]: With dead ends: 665 [2021-11-21 01:50:13,617 INFO L226 Difference]: Without dead ends: 665 [2021-11-21 01:50:13,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 146 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1458, Invalid=3654, Unknown=0, NotChecked=0, Total=5112 [2021-11-21 01:50:13,619 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 2446 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 82 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 1089 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1239 Invalid, 7 Unknown, 18 Unchecked, 31.1s Time] [2021-11-21 01:50:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-21 01:50:13,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 113. [2021-11-21 01:50:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 112 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2021-11-21 01:50:13,641 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 34 [2021-11-21 01:50:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2021-11-21 01:50:13,644 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) [2021-11-21 01:50:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2021-11-21 01:50:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:50:13,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:13,647 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:50:13,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:13,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-21 01:50:14,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2021-11-21 01:50:14,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:14,259 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:50:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 913185738, now seen corresponding path program 2 times [2021-11-21 01:50:14,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628690618] [2021-11-21 01:50:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:14,260 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:14,261 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:14,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-21 01:50:14,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:14,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:14,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:50:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:14,373 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 [2021-11-21 01:50:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:50:14,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 01:50:16,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628690618] [2021-11-21 01:50:16,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628690618] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [644306920] [2021-11-21 01:50:16,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:16,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:16,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:16,525 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:16,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-21 01:50:16,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:16,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:16,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:16,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:17,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:18,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:18,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [644306920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:18,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361508980] [2021-11-21 01:50:18,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:50:18,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:18,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:18,036 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:18,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-21 01:50:18,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:50:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:50:18,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:18,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:18,110 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 [2021-11-21 01:50:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:19,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:50:22,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361508980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:22,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:22,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11, 10, 11, 11] total 50 [2021-11-21 01:50:22,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505439098] [2021-11-21 01:50:22,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:22,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-21 01:50:22,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-21 01:50:22,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2021-11-21 01:50:22,917 INFO L87 Difference]: Start difference. First operand 113 states and 133 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) [2021-11-21 01:50:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:31,456 INFO L93 Difference]: Finished difference Result 211 states and 252 transitions. [2021-11-21 01:50:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-21 01:50:31,456 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 [2021-11-21 01:50:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:31,457 INFO L225 Difference]: With dead ends: 211 [2021-11-21 01:50:31,458 INFO L226 Difference]: Without dead ends: 209 [2021-11-21 01:50:31,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=712, Invalid=5608, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 01:50:31,461 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 205 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:31,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 605 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 262 Invalid, 0 Unknown, 17 Unchecked, 1.3s Time] [2021-11-21 01:50:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-21 01:50:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2021-11-21 01:50:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.2356687898089171) internal successors, (194), 158 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2021-11-21 01:50:31,468 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 34 [2021-11-21 01:50:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:31,468 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2021-11-21 01:50:31,468 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) [2021-11-21 01:50:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2021-11-21 01:50:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:50:31,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:31,470 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] [2021-11-21 01:50:31,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:31,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:31,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:32,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:32,082 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:50:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash 698168797, now seen corresponding path program 1 times [2021-11-21 01:50:32,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:32,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2044926622] [2021-11-21 01:50:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:32,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:32,085 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:32,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-21 01:50:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:32,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:32,176 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 [2021-11-21 01:50:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:32,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:50:36,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2044926622] [2021-11-21 01:50:36,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2044926622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:36,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [675961318] [2021-11-21 01:50:36,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:36,561 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:36,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:36,562 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:36,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-21 01:50:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:36,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:36,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:50:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:50:38,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [675961318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:38,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018915427] [2021-11-21 01:50:38,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:38,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:38,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:38,883 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:38,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-21 01:50:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:38,984 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 [2021-11-21 01:50:40,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:40,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:43,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018915427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:43,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:43,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-21 01:50:43,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103698693] [2021-11-21 01:50:43,284 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:43,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:50:43,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:43,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:50:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:50:43,286 INFO L87 Difference]: Start difference. First operand 159 states and 194 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) [2021-11-21 01:50:47,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:50:47,961 INFO L93 Difference]: Finished difference Result 216 states and 260 transitions. [2021-11-21 01:50:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:50:47,962 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 [2021-11-21 01:50:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:50:47,963 INFO L225 Difference]: With dead ends: 216 [2021-11-21 01:50:47,964 INFO L226 Difference]: Without dead ends: 206 [2021-11-21 01:50:47,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=428, Invalid=3232, Unknown=0, NotChecked=0, Total=3660 [2021-11-21 01:50:47,966 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:50:47,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 508 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 332 Invalid, 0 Unknown, 32 Unchecked, 1.3s Time] [2021-11-21 01:50:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-21 01:50:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 175. [2021-11-21 01:50:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 173 states have (on average 1.2369942196531791) internal successors, (214), 174 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:50:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 214 transitions. [2021-11-21 01:50:47,977 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 214 transitions. Word has length 40 [2021-11-21 01:50:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:50:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 214 transitions. [2021-11-21 01:50:47,977 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) [2021-11-21 01:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 214 transitions. [2021-11-21 01:50:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:50:47,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:50:47,979 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] [2021-11-21 01:50:47,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:48,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-21 01:50:48,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-21 01:50:48,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:48,582 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:50:48,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:50:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1768682083, now seen corresponding path program 1 times [2021-11-21 01:50:48,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:50:48,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401897314] [2021-11-21 01:50:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:48,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:50:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:50:48,583 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:50:48,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-21 01:50:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:48,690 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 [2021-11-21 01:50:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:49,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:52,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:50:52,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401897314] [2021-11-21 01:50:52,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401897314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:52,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1155688383] [2021-11-21 01:50:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:52,989 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:50:52,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:50:52,990 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:50:52,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-21 01:50:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:50:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:50:54,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:50:55,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1155688383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:55,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514281984] [2021-11-21 01:50:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:50:55,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:50:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:50:55,121 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:50:55,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-21 01:50:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:50:55,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:50:55,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:50:55,190 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 [2021-11-21 01:50:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:56,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:50:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:50:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514281984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:50:59,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:50:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-21 01:50:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511914677] [2021-11-21 01:50:59,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:50:59,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:50:59,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:50:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:50:59,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:50:59,457 INFO L87 Difference]: Start difference. First operand 175 states and 214 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) [2021-11-21 01:51:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:03,313 INFO L93 Difference]: Finished difference Result 220 states and 266 transitions. [2021-11-21 01:51:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 01:51:03,314 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 [2021-11-21 01:51:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:03,316 INFO L225 Difference]: With dead ends: 220 [2021-11-21 01:51:03,316 INFO L226 Difference]: Without dead ends: 218 [2021-11-21 01:51:03,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2021-11-21 01:51:03,318 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:03,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 551 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 276 Invalid, 0 Unknown, 32 Unchecked, 0.8s Time] [2021-11-21 01:51:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-21 01:51:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 191. [2021-11-21 01:51:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.2328042328042328) internal successors, (233), 190 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 233 transitions. [2021-11-21 01:51:03,331 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 233 transitions. Word has length 40 [2021-11-21 01:51:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:03,332 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 233 transitions. [2021-11-21 01:51:03,332 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) [2021-11-21 01:51:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 233 transitions. [2021-11-21 01:51:03,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:51:03,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:03,334 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] [2021-11-21 01:51:03,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-21 01:51:03,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-21 01:51:03,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-21 01:51:03,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:03,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:51:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -541356387, now seen corresponding path program 2 times [2021-11-21 01:51:03,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:51:03,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706140623] [2021-11-21 01:51:03,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:03,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:51:03,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:51:03,938 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:51:03,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-21 01:51:03,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:51:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:04,023 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 [2021-11-21 01:51:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:04,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:08,323 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:51:08,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706140623] [2021-11-21 01:51:08,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706140623] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:08,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070486813] [2021-11-21 01:51:08,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:08,324 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:51:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:51:08,324 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:51:08,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-21 01:51:08,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:08,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:08,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:51:08,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:51:09,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:51:10,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070486813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:10,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852342138] [2021-11-21 01:51:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:10,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:10,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:10,383 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:10,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-21 01:51:10,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:51:10,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:10,462 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 [2021-11-21 01:51:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:11,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:14,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852342138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:14,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:51:14,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-21 01:51:14,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457216071] [2021-11-21 01:51:14,534 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:51:14,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:51:14,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:51:14,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:51:14,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:51:14,536 INFO L87 Difference]: Start difference. First operand 191 states and 233 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) [2021-11-21 01:51:19,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:19,703 INFO L93 Difference]: Finished difference Result 264 states and 317 transitions. [2021-11-21 01:51:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:51:19,705 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 [2021-11-21 01:51:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:19,707 INFO L225 Difference]: With dead ends: 264 [2021-11-21 01:51:19,707 INFO L226 Difference]: Without dead ends: 260 [2021-11-21 01:51:19,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=441, Invalid=3465, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:51:19,709 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:19,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 476 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 290 Invalid, 0 Unknown, 44 Unchecked, 1.3s Time] [2021-11-21 01:51:19,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-21 01:51:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 225. [2021-11-21 01:51:19,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 223 states have (on average 1.2242152466367713) internal successors, (273), 224 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 273 transitions. [2021-11-21 01:51:19,715 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 273 transitions. Word has length 40 [2021-11-21 01:51:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:19,716 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 273 transitions. [2021-11-21 01:51:19,716 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) [2021-11-21 01:51:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 273 transitions. [2021-11-21 01:51:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-21 01:51:19,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:19,717 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] [2021-11-21 01:51:19,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-21 01:51:19,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-21 01:51:20,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:51:20,335 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:51:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1151440477, now seen corresponding path program 2 times [2021-11-21 01:51:20,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:51:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1095222406] [2021-11-21 01:51:20,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:20,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:51:20,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:51:20,336 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:51:20,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-21 01:51:20,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:20,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:20,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:51:20,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:20,414 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 [2021-11-21 01:51:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:21,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:24,618 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:51:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1095222406] [2021-11-21 01:51:24,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1095222406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:24,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550229826] [2021-11-21 01:51:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:24,619 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:51:24,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:51:24,620 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:51:24,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-21 01:51:24,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:24,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-21 01:51:24,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:51:25,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-21 01:51:26,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550229826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:26,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581120942] [2021-11-21 01:51:26,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-21 01:51:26,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:26,683 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:26,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-21 01:51:26,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-21 01:51:26,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:26,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-21 01:51:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:26,760 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 [2021-11-21 01:51:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:51:30,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581120942] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:30,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:51:30,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 11] total 48 [2021-11-21 01:51:30,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259440943] [2021-11-21 01:51:30,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:51:30,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:51:30,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:51:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:51:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:51:30,880 INFO L87 Difference]: Start difference. First operand 225 states and 273 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) [2021-11-21 01:51:35,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:51:35,296 INFO L93 Difference]: Finished difference Result 305 states and 367 transitions. [2021-11-21 01:51:35,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:51:35,297 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 [2021-11-21 01:51:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:51:35,299 INFO L225 Difference]: With dead ends: 305 [2021-11-21 01:51:35,299 INFO L226 Difference]: Without dead ends: 301 [2021-11-21 01:51:35,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=441, Invalid=3465, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 01:51:35,301 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 141 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:51:35,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 497 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 222 Invalid, 0 Unknown, 51 Unchecked, 0.5s Time] [2021-11-21 01:51:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-21 01:51:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 253. [2021-11-21 01:51:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.2270916334661355) internal successors, (308), 252 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:51:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 308 transitions. [2021-11-21 01:51:35,310 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 308 transitions. Word has length 40 [2021-11-21 01:51:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:51:35,310 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 308 transitions. [2021-11-21 01:51:35,310 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) [2021-11-21 01:51:35,310 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 308 transitions. [2021-11-21 01:51:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-21 01:51:35,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:51:35,312 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] [2021-11-21 01:51:35,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-21 01:51:35,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-21 01:51:35,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-21 01:51:35,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:51:35,914 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:51:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:51:35,914 INFO L85 PathProgramCache]: Analyzing trace with hash 121982368, now seen corresponding path program 3 times [2021-11-21 01:51:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:51:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339888507] [2021-11-21 01:51:35,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:35,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:51:35,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:51:35,916 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:51:35,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-21 01:51:36,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:51:36,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:36,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:51:36,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:36,026 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 [2021-11-21 01:51:36,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:51:36,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-21 01:51:39,025 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:51:39,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339888507] [2021-11-21 01:51:39,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339888507] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:39,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1145428202] [2021-11-21 01:51:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:39,026 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:51:39,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:51:39,039 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:51:39,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-21 01:51:39,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:51:39,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:39,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:51:39,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:39,468 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 [2021-11-21 01:51:40,558 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 [2021-11-21 01:51:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:51:40,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:51:46,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1145428202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:46,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613787523] [2021-11-21 01:51:46,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:51:46,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:51:46,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:51:46,284 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:51:46,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-21 01:51:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 01:51:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:51:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 01:51:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:51:46,479 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 [2021-11-21 01:51:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:51:46,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:51:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-21 01:51:48,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613787523] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:51:48,367 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:51:48,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14, 15, 9, 9] total 42 [2021-11-21 01:51:48,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584454621] [2021-11-21 01:51:48,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:51:48,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-21 01:51:48,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:51:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-21 01:51:48,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1488, Unknown=0, NotChecked=0, Total=1722 [2021-11-21 01:51:48,369 INFO L87 Difference]: Start difference. First operand 253 states and 308 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) [2021-11-21 01:52:00,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:52:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:52:05,154 INFO L93 Difference]: Finished difference Result 425 states and 505 transitions. [2021-11-21 01:52:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-21 01:52:05,155 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 [2021-11-21 01:52:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:52:05,157 INFO L225 Difference]: With dead ends: 425 [2021-11-21 01:52:05,157 INFO L226 Difference]: Without dead ends: 265 [2021-11-21 01:52:05,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=974, Invalid=4282, Unknown=0, NotChecked=0, Total=5256 [2021-11-21 01:52:05,159 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 1671 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1671 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:52:05,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1671 Valid, 1045 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1245 Invalid, 0 Unknown, 103 Unchecked, 4.8s Time] [2021-11-21 01:52:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-21 01:52:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 169. [2021-11-21 01:52:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 168 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:52:05,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 195 transitions. [2021-11-21 01:52:05,163 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 195 transitions. Word has length 44 [2021-11-21 01:52:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:52:05,164 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 195 transitions. [2021-11-21 01:52:05,164 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) [2021-11-21 01:52:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 195 transitions. [2021-11-21 01:52:05,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:52:05,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:52:05,165 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-21 01:52:05,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-21 01:52:05,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-21 01:52:05,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-11-21 01:52:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 01:52:05,769 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:52:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:52:05,769 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-21 01:52:05,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:52:05,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [760477529] [2021-11-21 01:52:05,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:05,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:52:05,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:52:05,771 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:52:05,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-21 01:52:05,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 01:52:05,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:05,915 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 [2021-11-21 01:52:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:07,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:17,749 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:52:17,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [760477529] [2021-11-21 01:52:17,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [760477529] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:17,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604038686] [2021-11-21 01:52:17,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:17,750 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:52:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:52:17,751 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:52:17,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-21 01:52:17,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:17,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:17,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:52:17,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:17,957 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 [2021-11-21 01:52:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:19,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604038686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369485772] [2021-11-21 01:52:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:52:28,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:52:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:52:28,993 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:52:28,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-21 01:52:29,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:52:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:52:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:52:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:52:29,102 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 [2021-11-21 01:52:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:31,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:52:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:52:51,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369485772] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:52:51,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 01:52:51,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-21 01:52:51,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94086693] [2021-11-21 01:52:51,245 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 01:52:51,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-21 01:52:51,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 01:52:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-21 01:52:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-21 01:52:51,250 INFO L87 Difference]: Start difference. First operand 169 states and 195 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) [2021-11-21 01:53:01,936 WARN L227 SmtUtils]: Spent 5.32s 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) [2021-11-21 01:53:04,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:06,127 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:08,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:10,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:12,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:14,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:16,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:18,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:23,971 WARN L227 SmtUtils]: Spent 5.28s 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) [2021-11-21 01:53:30,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:32,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:34,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:36,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:38,173 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:40,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:42,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:44,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:56,513 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:53:58,516 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:00,518 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:02,521 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:04,524 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:06,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:08,618 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:19,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:21,961 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:23,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:25,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:27,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:30,020 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:32,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:42,015 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:44,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:46,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:48,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:49,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:54:51,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:00,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:02,877 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:04,772 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:06,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:08,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:10,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:19,612 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:21,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:23,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:25,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:27,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:33,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:35,940 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:37,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:39,307 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:45,378 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:47,343 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:49,346 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:55,288 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:56,930 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:58,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:03,739 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:05,767 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:10,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:17,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:17,406 INFO L93 Difference]: Finished difference Result 2885 states and 3291 transitions. [2021-11-21 01:56:17,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-21 01:56:17,407 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 [2021-11-21 01:56:17,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:17,419 INFO L225 Difference]: With dead ends: 2885 [2021-11-21 01:56:17,419 INFO L226 Difference]: Without dead ends: 2885 [2021-11-21 01:56:17,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8278 ImplicationChecksByTransitivity, 105.9s TimeCoverageRelationStatistics Valid=5451, Invalid=14289, Unknown=0, NotChecked=0, Total=19740 [2021-11-21 01:56:17,422 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 8110 mSDsluCounter, 3561 mSDsCounter, 0 mSdLazyCounter, 4250 mSolverCounterSat, 202 mSolverCounterUnsat, 51 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8110 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 4540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4250 IncrementalHoareTripleChecker+Invalid, 51 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 132.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:17,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8110 Valid, 3700 Invalid, 4540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4250 Invalid, 51 Unknown, 37 Unchecked, 132.1s Time] [2021-11-21 01:56:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-11-21 01:56:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 233. [2021-11-21 01:56:17,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1904761904761905) internal successors, (275), 232 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:56:17,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 275 transitions. [2021-11-21 01:56:17,445 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 275 transitions. Word has length 66 [2021-11-21 01:56:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:17,445 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 275 transitions. [2021-11-21 01:56:17,446 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) [2021-11-21 01:56:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 275 transitions. [2021-11-21 01:56:17,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-21 01:56:17,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:17,447 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:56:17,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-21 01:56:17,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-21 01:56:17,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-21 01:56:18,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 01:56:18,075 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 01:56:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:18,075 INFO L85 PathProgramCache]: Analyzing trace with hash 324648416, now seen corresponding path program 3 times [2021-11-21 01:56:18,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 01:56:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333900298] [2021-11-21 01:56:18,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:56:18,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 01:56:18,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 01:56:18,077 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 01:56:18,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-21 01:56:18,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:56:18,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:56:18,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 01:56:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:18,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 01:56:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 74 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:56:21,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:57:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:57:05,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 01:57:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333900298] [2021-11-21 01:57:05,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333900298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:57:05,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [610812424] [2021-11-21 01:57:05,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:57:05,036 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 01:57:05,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 01:57:05,037 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 01:57:05,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2021-11-21 01:57:08,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:57:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:57:08,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:57:08,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:57:08,509 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 [2021-11-21 01:57:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 126 proven. 32 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:57:15,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:58:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:58:42,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [610812424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:58:42,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298193505] [2021-11-21 01:58:42,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:58:42,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:58:42,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:58:42,532 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:58:42,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-21 01:58:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 01:58:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:58:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-21 01:58:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:58:42,825 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 [2021-11-21 01:58:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 104 proven. 54 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 01:58:52,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:00:17,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298193505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:17,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:00:17,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 19, 20, 21, 20] total 82 [2021-11-21 02:00:17,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411238183] [2021-11-21 02:00:17,465 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:00:17,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-21 02:00:17,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:00:17,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-21 02:00:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=801, Invalid=5815, Unknown=26, NotChecked=0, Total=6642 [2021-11-21 02:00:17,467 INFO L87 Difference]: Start difference. First operand 233 states and 275 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) [2021-11-21 02:00:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:00:38,588 INFO L93 Difference]: Finished difference Result 282 states and 331 transitions. [2021-11-21 02:00:38,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 02:00:38,590 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 [2021-11-21 02:00:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:00:38,591 INFO L225 Difference]: With dead ends: 282 [2021-11-21 02:00:38,592 INFO L226 Difference]: Without dead ends: 279 [2021-11-21 02:00:38,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 302 SyntacticMatches, 15 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4254 ImplicationChecksByTransitivity, 166.1s TimeCoverageRelationStatistics Valid=957, Invalid=6671, Unknown=28, NotChecked=0, Total=7656 [2021-11-21 02:00:38,593 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 149 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 02:00:38,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 577 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 274 Invalid, 0 Unknown, 110 Unchecked, 4.7s Time] [2021-11-21 02:00:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-21 02:00:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 257. [2021-11-21 02:00:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 255 states have (on average 1.2) internal successors, (306), 256 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:00:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2021-11-21 02:00:38,601 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 66 [2021-11-21 02:00:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:00:38,601 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2021-11-21 02:00:38,601 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) [2021-11-21 02:00:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2021-11-21 02:00:38,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 02:00:38,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:00:38,603 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 02:00:38,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-21 02:00:38,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-21 02:00:39,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2021-11-21 02:00:39,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:39,226 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 02:00:39,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:00:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 578637987, now seen corresponding path program 4 times [2021-11-21 02:00:39,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:00:39,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28098120] [2021-11-21 02:00:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:00:39,227 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:00:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:00:39,227 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:00:39,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-21 02:00:39,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:00:39,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:39,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 02:00:39,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:00:39,377 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 [2021-11-21 02:00:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 64 proven. 115 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 02:00:42,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:00:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 02:00:55,562 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:00:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28098120] [2021-11-21 02:00:55,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28098120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:00:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416071343] [2021-11-21 02:00:55,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:00:55,563 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:00:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:00:55,574 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:00:55,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-21 02:00:55,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:00:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:00:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 02:00:55,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 02:01:00,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 02:01:06,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416071343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240209033] [2021-11-21 02:01:06,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:01:06,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:06,248 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:06,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-21 02:01:06,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:01:06,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:06,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 02:01:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:06,353 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 [2021-11-21 02:01:06,656 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 [2021-11-21 02:01:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 02:01:11,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 67 proven. 110 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-21 02:01:16,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240209033] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:16,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:01:16,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17, 16, 19, 17] total 80 [2021-11-21 02:01:16,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981874780] [2021-11-21 02:01:16,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:01:16,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-21 02:01:16,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:01:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-21 02:01:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=5834, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 02:01:16,318 INFO L87 Difference]: Start difference. First operand 257 states and 306 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) [2021-11-21 02:01:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:01:32,686 INFO L93 Difference]: Finished difference Result 321 states and 379 transitions. [2021-11-21 02:01:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 02:01:32,688 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 [2021-11-21 02:01:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:01:32,690 INFO L225 Difference]: With dead ends: 321 [2021-11-21 02:01:32,690 INFO L226 Difference]: Without dead ends: 319 [2021-11-21 02:01:32,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 348 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=910, Invalid=9392, Unknown=0, NotChecked=0, Total=10302 [2021-11-21 02:01:32,692 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 251 mSDsluCounter, 1587 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 02:01:32,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 1638 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 879 Invalid, 0 Unknown, 44 Unchecked, 4.7s Time] [2021-11-21 02:01:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-21 02:01:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 287. [2021-11-21 02:01:32,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 285 states have (on average 1.2105263157894737) internal successors, (345), 286 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:01:32,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 345 transitions. [2021-11-21 02:01:32,700 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 345 transitions. Word has length 70 [2021-11-21 02:01:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:01:32,700 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 345 transitions. [2021-11-21 02:01:32,701 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) [2021-11-21 02:01:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 345 transitions. [2021-11-21 02:01:32,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 02:01:32,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:01:32,702 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] [2021-11-21 02:01:32,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2021-11-21 02:01:32,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:33,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-21 02:01:33,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:01:33,305 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 02:01:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:01:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1448579315, now seen corresponding path program 4 times [2021-11-21 02:01:33,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:01:33,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090181858] [2021-11-21 02:01:33,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:01:33,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:01:33,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:01:33,307 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:01:33,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-21 02:01:33,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:01:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 02:01:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:33,452 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 [2021-11-21 02:01:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 59 proven. 117 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 02:01:36,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:47,099 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 02:01:47,099 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-21 02:01:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090181858] [2021-11-21 02:01:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090181858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652254716] [2021-11-21 02:01:47,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:01:47,099 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-21 02:01:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 [2021-11-21 02:01:47,100 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-21 02:01:47,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2021-11-21 02:01:47,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:01:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-21 02:01:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 85 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 02:01:50,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:01:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 85 proven. 74 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-21 02:01:55,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652254716] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:01:55,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589223256] [2021-11-21 02:01:55,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 02:01:55,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 02:01:55,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 02:01:55,447 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 02:01:55,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-21 02:01:55,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 02:01:55,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:01:55,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-21 02:01:55,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:01:55,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-21 02:01:55,874 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 [2021-11-21 02:01:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 71 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:01:57,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 02:02:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 71 proven. 101 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 02:02:03,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589223256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 02:02:03,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-21 02:02:03,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 14, 17, 16] total 69 [2021-11-21 02:02:03,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139302004] [2021-11-21 02:02:03,278 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-21 02:02:03,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-21 02:02:03,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-21 02:02:03,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-21 02:02:03,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=4255, Unknown=0, NotChecked=0, Total=4692 [2021-11-21 02:02:03,280 INFO L87 Difference]: Start difference. First operand 287 states and 345 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) [2021-11-21 02:02:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 02:02:23,901 INFO L93 Difference]: Finished difference Result 371 states and 433 transitions. [2021-11-21 02:02:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-21 02:02:23,904 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 [2021-11-21 02:02:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 02:02:23,905 INFO L225 Difference]: With dead ends: 371 [2021-11-21 02:02:23,905 INFO L226 Difference]: Without dead ends: 333 [2021-11-21 02:02:23,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 366 SyntacticMatches, 8 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=840, Invalid=7902, Unknown=0, NotChecked=0, Total=8742 [2021-11-21 02:02:23,906 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 241 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-21 02:02:23,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 1192 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 722 Invalid, 0 Unknown, 84 Unchecked, 4.3s Time] [2021-11-21 02:02:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-21 02:02:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 291. [2021-11-21 02:02:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 289 states have (on average 1.2006920415224913) internal successors, (347), 290 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 02:02:23,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 347 transitions. [2021-11-21 02:02:23,913 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 347 transitions. Word has length 72 [2021-11-21 02:02:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 02:02:23,913 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 347 transitions. [2021-11-21 02:02:23,914 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) [2021-11-21 02:02:23,914 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 347 transitions. [2021-11-21 02:02:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-21 02:02:23,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 02:02:23,915 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] [2021-11-21 02:02:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:24,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2021-11-21 02:02:24,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (53)] Ended with exit code 0 [2021-11-21 02:02:24,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 [2021-11-21 02:02:24,534 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-21 02:02:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 02:02:24,535 INFO L85 PathProgramCache]: Analyzing trace with hash -284637005, now seen corresponding path program 3 times [2021-11-21 02:02:24,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-21 02:02:24,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783812588] [2021-11-21 02:02:24,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 02:02:24,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-21 02:02:24,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat [2021-11-21 02:02:24,536 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-21 02:02:24,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b47ad60a-2e9d-4518-8f78-46168ccb39f7/bin/utaipan-TEXQjIfE4P/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-21 02:02:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-21 02:02:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 02:02:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 02:02:24,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 02:02:24,794 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 [2021-11-21 02:02:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 94 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 02:02:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates...