./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:01,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:01,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:01,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:01,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:01,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:01,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:01,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:01,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:01,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:01,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:01,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:01,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:01,978 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:01,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:01,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:01,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:01,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:01,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:02,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:02,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:02,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:02,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:02,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:02,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:02,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:02,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:02,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:02,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:02,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:02,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:02,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:02,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:02,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:02,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:02,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:02,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:02,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:02,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:02,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:02,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:02,055 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:45:02,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:02,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:02,121 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:02,121 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:02,122 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:02,122 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:02,122 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:45:02,123 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:02,131 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:02,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:45:02,133 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:45:02,133 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:02,134 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:45:02,134 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:45:02,134 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:45:02,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:02,136 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:02,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:45:02,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:02,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:02,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:02,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:02,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:02,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:02,138 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:02,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:02,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:02,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:02,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:02,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:02,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:02,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:02,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:02,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:02,144 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:45:02,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:45:02,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:02,145 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:02,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:02,145 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_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2021-11-07 01:45:02,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:02,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:02,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:02,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:02,582 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:02,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-11-07 01:45:02,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/52fd89dee/529f350c0e2a4e47bac4548098568c3e/FLAG4bdf01061 [2021-11-07 01:45:03,431 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:03,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-11-07 01:45:03,453 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/52fd89dee/529f350c0e2a4e47bac4548098568c3e/FLAG4bdf01061 [2021-11-07 01:45:03,732 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/52fd89dee/529f350c0e2a4e47bac4548098568c3e [2021-11-07 01:45:03,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:03,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:03,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:03,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:03,746 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:03,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:03" (1/1) ... [2021-11-07 01:45:03,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c85d0a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:03, skipping insertion in model container [2021-11-07 01:45:03,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:03" (1/1) ... [2021-11-07 01:45:03,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:03,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:04,097 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2021-11-07 01:45:04,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:04,123 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:45:04,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28399433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:04, skipping insertion in model container [2021-11-07 01:45:04,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:04,125 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:45:04,128 INFO L168 Benchmark]: Toolchain (without parser) took 388.35 ms. Allocated memory is still 100.7 MB. Free memory was 66.2 MB in the beginning and 77.5 MB in the end (delta: -11.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:04,129 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:45:04,130 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.07 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 77.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:45:04,133 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 100.7 MB. Free memory was 73.6 MB in the beginning and 73.6 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.07 ms. Allocated memory is still 100.7 MB. Free memory was 65.9 MB in the beginning and 77.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: 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_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:45:07,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:45:07,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:45:07,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:45:07,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:45:07,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:45:07,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:45:07,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:45:07,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:45:07,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:45:07,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:45:07,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:45:07,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:45:07,162 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:45:07,164 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:45:07,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:45:07,173 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:45:07,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:45:07,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:45:07,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:45:07,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:45:07,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:45:07,189 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:45:07,190 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:45:07,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:45:07,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:45:07,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:45:07,197 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:45:07,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:45:07,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:45:07,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:45:07,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:45:07,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:45:07,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:45:07,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:45:07,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:45:07,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:45:07,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:45:07,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:45:07,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:45:07,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:45:07,212 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:45:07,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:45:07,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:45:07,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:45:07,246 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:45:07,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:45:07,247 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:45:07,247 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:45:07,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:45:07,248 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:45:07,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:45:07,249 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:45:07,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:45:07,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:45:07,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:45:07,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:45:07,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:45:07,251 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:45:07,251 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:45:07,252 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:45:07,252 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:45:07,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:45:07,252 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:45:07,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:45:07,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:45:07,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:45:07,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:45:07,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:07,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:45:07,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:45:07,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:45:07,255 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:45:07,256 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:45:07,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:45:07,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:45:07,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:45:07,257 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_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2021-11-07 01:45:07,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:45:07,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:45:07,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:45:07,745 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:45:07,746 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:45:07,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-11-07 01:45:07,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/191d832b5/93f29b0437f5463d9186b9485a03ba42/FLAG065c7c17a [2021-11-07 01:45:08,540 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:45:08,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2021-11-07 01:45:08,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/191d832b5/93f29b0437f5463d9186b9485a03ba42/FLAG065c7c17a [2021-11-07 01:45:08,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/data/191d832b5/93f29b0437f5463d9186b9485a03ba42 [2021-11-07 01:45:08,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:45:08,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:45:08,830 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:08,830 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:45:08,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:45:08,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:08" (1/1) ... [2021-11-07 01:45:08,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b87246a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:08, skipping insertion in model container [2021-11-07 01:45:08,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:45:08" (1/1) ... [2021-11-07 01:45:08,847 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:45:08,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:09,168 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2021-11-07 01:45:09,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:09,198 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:45:09,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:45:09,246 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2021-11-07 01:45:09,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:09,283 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:45:09,349 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2021-11-07 01:45:09,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:45:09,377 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:45:09,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09 WrapperNode [2021-11-07 01:45:09,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:45:09,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:09,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:45:09,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:45:09,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:45:09,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:45:09,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:45:09,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:45:09,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:45:09,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:45:09,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:45:09,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:45:09,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (1/1) ... [2021-11-07 01:45:09,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:45:09,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:45:09,656 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:45:09,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:45:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:45:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:45:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:45:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-11-07 01:45:09,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-11-07 01:45:09,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-11-07 01:45:09,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-11-07 01:45:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-11-07 01:45:09,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-11-07 01:45:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-11-07 01:45:09,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-11-07 01:45:09,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-11-07 01:45:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-11-07 01:45:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:45:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:45:09,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:45:09,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:45:09,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:45:09,730 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-11-07 01:45:12,345 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:45:12,345 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-07 01:45:12,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:12 BoogieIcfgContainer [2021-11-07 01:45:12,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:45:12,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:45:12,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:45:12,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:45:12,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:45:08" (1/3) ... [2021-11-07 01:45:12,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd1785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:45:09" (2/3) ... [2021-11-07 01:45:12,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53dd1785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:45:12, skipping insertion in model container [2021-11-07 01:45:12,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:45:12" (3/3) ... [2021-11-07 01:45:12,374 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2021-11-07 01:45:12,384 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-11-07 01:45:12,384 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:45:12,384 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:45:12,385 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-11-07 01:45:12,456 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,456 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,457 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,457 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,458 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,458 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,458 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,459 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,460 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,461 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,462 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,462 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,464 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,464 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,465 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,466 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,466 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,466 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,467 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,467 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,467 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,467 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,468 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,470 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,470 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,471 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,472 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,474 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,474 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,475 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,475 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,475 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,477 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,477 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,478 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,479 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,479 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,481 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,482 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,483 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,483 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,483 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,483 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,484 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,484 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,484 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,484 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,484 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,485 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,485 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,485 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,486 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,486 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,486 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,486 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,487 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,487 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,487 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,487 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,488 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,489 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,493 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,494 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,496 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,497 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,498 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,498 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,500 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,505 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,505 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,506 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,507 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,508 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,509 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,509 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,509 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,509 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,512 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,512 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,513 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,514 WARN L322 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,514 WARN L322 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~cond~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,517 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,517 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~ret16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,517 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_~cond~3 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,517 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,517 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,518 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,518 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,518 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,518 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,519 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,519 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,519 WARN L322 ript$VariableManager]: TermVariabe thread4Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,519 WARN L322 ript$VariableManager]: TermVariabe |thread4Thread1of1ForFork1_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,522 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,522 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,522 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,522 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_~cond~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,523 WARN L322 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,523 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,524 WARN L322 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,526 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~mem12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,526 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,526 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_~cond~2 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,527 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,527 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,527 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_plus_~a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,527 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,527 WARN L322 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,528 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,528 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~a| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,528 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_plus_#in~b| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,528 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,528 WARN L322 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork3_#t~ret13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-07 01:45:12,538 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-11-07 01:45:12,616 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:45:12,629 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:45:12,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 01:45:12,659 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-11-07 01:45:12,678 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 233 transitions, 498 flow [2021-11-07 01:45:12,684 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 233 transitions, 498 flow [2021-11-07 01:45:12,687 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 224 places, 233 transitions, 498 flow [2021-11-07 01:45:12,868 INFO L129 PetriNetUnfolder]: 22/229 cut-off events. [2021-11-07 01:45:12,869 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-11-07 01:45:12,878 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 229 events. 22/229 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 131 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 193. Up to 2 conditions per place. [2021-11-07 01:45:12,885 INFO L116 LiptonReduction]: Number of co-enabled transitions 2000 [2021-11-07 01:45:45,087 WARN L207 SmtUtils]: Spent 7.02 s on a formula simplification. DAG size of input: 170 DAG size of output: 169 [2021-11-07 01:45:54,202 WARN L207 SmtUtils]: Spent 7.27 s on a formula simplification. DAG size of input: 172 DAG size of output: 171 [2021-11-07 01:45:56,359 INFO L131 LiptonReduction]: Checked pairs total: 3841 [2021-11-07 01:45:56,359 INFO L133 LiptonReduction]: Total number of compositions: 226 [2021-11-07 01:45:56,369 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 44 transitions, 120 flow [2021-11-07 01:45:56,466 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 855 states, 854 states have (on average 4.17096018735363) internal successors, (3562), 854 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand has 855 states, 854 states have (on average 4.17096018735363) internal successors, (3562), 854 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 01:45:56,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:56,506 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:56,507 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:45:56,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1479702764, now seen corresponding path program 1 times [2021-11-07 01:45:56,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:56,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215063339] [2021-11-07 01:45:56,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:56,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:56,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:56,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:45:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:56,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:56,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:56,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:57,119 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:57,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215063339] [2021-11-07 01:45:57,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215063339] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:57,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:57,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-07 01:45:57,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545856073] [2021-11-07 01:45:57,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:45:57,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:45:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:57,179 INFO L87 Difference]: Start difference. First operand has 855 states, 854 states have (on average 4.17096018735363) internal successors, (3562), 854 states have internal predecessors, (3562), 0 states have call successors, (0), 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 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:57,318 INFO L93 Difference]: Finished difference Result 1262 states and 5287 transitions. [2021-11-07 01:45:57,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-11-07 01:45:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:57,363 INFO L225 Difference]: With dead ends: 1262 [2021-11-07 01:45:57,363 INFO L226 Difference]: Without dead ends: 1217 [2021-11-07 01:45:57,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:45:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-11-07 01:45:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2021-11-07 01:45:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 4.194078947368421) internal successors, (5100), 1216 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 5100 transitions. [2021-11-07 01:45:57,560 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 5100 transitions. Word has length 28 [2021-11-07 01:45:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:57,561 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 5100 transitions. [2021-11-07 01:45:57,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 5100 transitions. [2021-11-07 01:45:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:45:57,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:57,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:57,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:57,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:45:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1168360533, now seen corresponding path program 1 times [2021-11-07 01:45:57,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:57,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976781030] [2021-11-07 01:45:57,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:57,795 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:57,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:57,798 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:57,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:45:58,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:58,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:58,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:58,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:58,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976781030] [2021-11-07 01:45:58,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976781030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:58,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:58,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:45:58,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565471106] [2021-11-07 01:45:58,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:58,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:58,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:58,634 INFO L87 Difference]: Start difference. First operand 1217 states and 5100 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:58,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:58,788 INFO L93 Difference]: Finished difference Result 1667 states and 6700 transitions. [2021-11-07 01:45:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 30 [2021-11-07 01:45:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:58,816 INFO L225 Difference]: With dead ends: 1667 [2021-11-07 01:45:58,816 INFO L226 Difference]: Without dead ends: 1631 [2021-11-07 01:45:58,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-11-07 01:45:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1473. [2021-11-07 01:45:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 4.130434782608695) internal successors, (6080), 1472 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:58,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 6080 transitions. [2021-11-07 01:45:58,923 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 6080 transitions. Word has length 30 [2021-11-07 01:45:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:58,924 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 6080 transitions. [2021-11-07 01:45:58,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 6080 transitions. [2021-11-07 01:45:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 01:45:58,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:58,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:45:58,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:59,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:45:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:59,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1650930629, now seen corresponding path program 1 times [2021-11-07 01:45:59,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:59,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058895392] [2021-11-07 01:45:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:59,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:59,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:59,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:59,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:59,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:45:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:59,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:59,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:59,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058895392] [2021-11-07 01:45:59,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058895392] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:59,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:59,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:45:59,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780575219] [2021-11-07 01:45:59,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:45:59,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:59,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:45:59,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:45:59,848 INFO L87 Difference]: Start difference. First operand 1473 states and 6080 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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) [2021-11-07 01:45:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:59,987 INFO L93 Difference]: Finished difference Result 1909 states and 7599 transitions. [2021-11-07 01:45:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:45:59,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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) Word has length 30 [2021-11-07 01:45:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:00,015 INFO L225 Difference]: With dead ends: 1909 [2021-11-07 01:46:00,016 INFO L226 Difference]: Without dead ends: 1843 [2021-11-07 01:46:00,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:46:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-11-07 01:46:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1733. [2021-11-07 01:46:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1733 states, 1732 states have (on average 4.054849884526559) internal successors, (7023), 1732 states have internal predecessors, (7023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1733 states to 1733 states and 7023 transitions. [2021-11-07 01:46:00,146 INFO L78 Accepts]: Start accepts. Automaton has 1733 states and 7023 transitions. Word has length 30 [2021-11-07 01:46:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:00,146 INFO L470 AbstractCegarLoop]: Abstraction has 1733 states and 7023 transitions. [2021-11-07 01:46:00,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 3 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) [2021-11-07 01:46:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1733 states and 7023 transitions. [2021-11-07 01:46:00,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:46:00,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:00,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:00,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:00,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:00,385 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1258374526, now seen corresponding path program 1 times [2021-11-07 01:46:00,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:00,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354058263] [2021-11-07 01:46:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:00,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:00,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:00,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:46:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:00,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:00,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:01,120 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:01,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354058263] [2021-11-07 01:46:01,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354058263] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:01,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:01,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:46:01,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248329550] [2021-11-07 01:46:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:01,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:01,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:01,123 INFO L87 Difference]: Start difference. First operand 1733 states and 7023 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:01,355 INFO L93 Difference]: Finished difference Result 2421 states and 9413 transitions. [2021-11-07 01:46:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2021-11-07 01:46:01,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:01,392 INFO L225 Difference]: With dead ends: 2421 [2021-11-07 01:46:01,393 INFO L226 Difference]: Without dead ends: 2361 [2021-11-07 01:46:01,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-11-07 01:46:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2049. [2021-11-07 01:46:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 4.025390625) internal successors, (8244), 2048 states have internal predecessors, (8244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 8244 transitions. [2021-11-07 01:46:01,526 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 8244 transitions. Word has length 32 [2021-11-07 01:46:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:01,527 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 8244 transitions. [2021-11-07 01:46:01,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 8244 transitions. [2021-11-07 01:46:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 01:46:01,541 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:01,541 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:01,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:01,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:01,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1359952924, now seen corresponding path program 1 times [2021-11-07 01:46:01,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:01,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165995473] [2021-11-07 01:46:01,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:01,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:01,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:01,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:01,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:46:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:46:02,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:02,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:02,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:02,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165995473] [2021-11-07 01:46:02,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165995473] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:02,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:02,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:46:02,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738814536] [2021-11-07 01:46:02,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:46:02,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:46:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:02,593 INFO L87 Difference]: Start difference. First operand 2049 states and 8244 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:02,840 INFO L93 Difference]: Finished difference Result 2865 states and 11033 transitions. [2021-11-07 01:46:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:46:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 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 32 [2021-11-07 01:46:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:02,889 INFO L225 Difference]: With dead ends: 2865 [2021-11-07 01:46:02,889 INFO L226 Difference]: Without dead ends: 2677 [2021-11-07 01:46:02,890 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:46:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-11-07 01:46:03,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2447. [2021-11-07 01:46:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 3.9950940310711367) internal successors, (9772), 2446 states have internal predecessors, (9772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 9772 transitions. [2021-11-07 01:46:03,059 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 9772 transitions. Word has length 32 [2021-11-07 01:46:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:03,059 INFO L470 AbstractCegarLoop]: Abstraction has 2447 states and 9772 transitions. [2021-11-07 01:46:03,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 9772 transitions. [2021-11-07 01:46:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:03,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:03,073 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:03,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:03,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,290 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:03,290 INFO L85 PathProgramCache]: Analyzing trace with hash -433736899, now seen corresponding path program 1 times [2021-11-07 01:46:03,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:03,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040046494] [2021-11-07 01:46:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:03,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:03,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:03,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:03,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:46:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:03,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:04,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:04,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:04,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040046494] [2021-11-07 01:46:04,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040046494] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:04,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:04,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 01:46:04,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974077737] [2021-11-07 01:46:04,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:04,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:04,580 INFO L87 Difference]: Start difference. First operand 2447 states and 9772 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-11-07 01:46:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:06,312 INFO L93 Difference]: Finished difference Result 4417 states and 17017 transitions. [2021-11-07 01:46:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:46:06,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 33 [2021-11-07 01:46:06,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:06,394 INFO L225 Difference]: With dead ends: 4417 [2021-11-07 01:46:06,394 INFO L226 Difference]: Without dead ends: 4005 [2021-11-07 01:46:06,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:46:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-11-07 01:46:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 2667. [2021-11-07 01:46:06,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2666 states have (on average 4.047261815453863) internal successors, (10790), 2666 states have internal predecessors, (10790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:06,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 10790 transitions. [2021-11-07 01:46:06,666 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 10790 transitions. Word has length 33 [2021-11-07 01:46:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:06,667 INFO L470 AbstractCegarLoop]: Abstraction has 2667 states and 10790 transitions. [2021-11-07 01:46:06,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-11-07 01:46:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 10790 transitions. [2021-11-07 01:46:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:06,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:06,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:06,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:06,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,901 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1207722149, now seen corresponding path program 2 times [2021-11-07 01:46:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:06,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091652186] [2021-11-07 01:46:06,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:06,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:06,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:06,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:46:07,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:07,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:07,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:08,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:08,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:08,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091652186] [2021-11-07 01:46:08,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091652186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:08,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:08,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:46:08,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890315020] [2021-11-07 01:46:08,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:46:08,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:08,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:46:08,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:08,536 INFO L87 Difference]: Start difference. First operand 2667 states and 10790 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-11-07 01:46:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:11,209 INFO L93 Difference]: Finished difference Result 7133 states and 27495 transitions. [2021-11-07 01:46:11,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:46:11,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) Word has length 33 [2021-11-07 01:46:11,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:11,262 INFO L225 Difference]: With dead ends: 7133 [2021-11-07 01:46:11,262 INFO L226 Difference]: Without dead ends: 7049 [2021-11-07 01:46:11,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:46:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7049 states. [2021-11-07 01:46:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7049 to 3165. [2021-11-07 01:46:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3165 states, 3164 states have (on average 4.139696586599242) internal successors, (13098), 3164 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 13098 transitions. [2021-11-07 01:46:11,636 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 13098 transitions. Word has length 33 [2021-11-07 01:46:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:11,637 INFO L470 AbstractCegarLoop]: Abstraction has 3165 states and 13098 transitions. [2021-11-07 01:46:11,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-11-07 01:46:11,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 13098 transitions. [2021-11-07 01:46:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:11,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:11,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:11,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:11,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:11,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash -121966215, now seen corresponding path program 3 times [2021-11-07 01:46:11,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:11,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174937310] [2021-11-07 01:46:11,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:11,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:11,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:11,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:11,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:46:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:46:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:12,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:13,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:13,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:13,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174937310] [2021-11-07 01:46:13,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174937310] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:13,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:13,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2021-11-07 01:46:13,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153637006] [2021-11-07 01:46:13,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:13,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:13,646 INFO L87 Difference]: Start difference. First operand 3165 states and 13098 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-11-07 01:46:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:15,144 INFO L93 Difference]: Finished difference Result 5219 states and 20154 transitions. [2021-11-07 01:46:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:46:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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 33 [2021-11-07 01:46:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:15,231 INFO L225 Difference]: With dead ends: 5219 [2021-11-07 01:46:15,232 INFO L226 Difference]: Without dead ends: 4929 [2021-11-07 01:46:15,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:46:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4929 states. [2021-11-07 01:46:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4929 to 2717. [2021-11-07 01:46:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 2716 states have (on average 4.092783505154639) internal successors, (11116), 2716 states have internal predecessors, (11116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 11116 transitions. [2021-11-07 01:46:15,426 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 11116 transitions. Word has length 33 [2021-11-07 01:46:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:15,427 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 11116 transitions. [2021-11-07 01:46:15,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 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) [2021-11-07 01:46:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 11116 transitions. [2021-11-07 01:46:15,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:15,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:15,442 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:15,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:15,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:15,664 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash 472041495, now seen corresponding path program 4 times [2021-11-07 01:46:15,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:15,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087473103] [2021-11-07 01:46:15,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:46:15,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:15,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:15,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:15,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:46:16,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:46:16,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:16,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:16,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:17,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:17,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087473103] [2021-11-07 01:46:17,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087473103] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:17,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:17,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:46:17,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023212186] [2021-11-07 01:46:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:46:17,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:46:17,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:17,085 INFO L87 Difference]: Start difference. First operand 2717 states and 11116 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-11-07 01:46:20,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:20,312 INFO L93 Difference]: Finished difference Result 7897 states and 30427 transitions. [2021-11-07 01:46:20,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 01:46:20,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) Word has length 33 [2021-11-07 01:46:20,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:20,401 INFO L225 Difference]: With dead ends: 7897 [2021-11-07 01:46:20,401 INFO L226 Difference]: Without dead ends: 7813 [2021-11-07 01:46:20,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 01:46:20,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2021-11-07 01:46:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 3201. [2021-11-07 01:46:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 4.229375) internal successors, (13534), 3200 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 13534 transitions. [2021-11-07 01:46:20,718 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 13534 transitions. Word has length 33 [2021-11-07 01:46:20,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:20,718 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 13534 transitions. [2021-11-07 01:46:20,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 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) [2021-11-07 01:46:20,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 13534 transitions. [2021-11-07 01:46:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:20,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:20,734 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:20,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:20,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:20,948 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:20,949 INFO L85 PathProgramCache]: Analyzing trace with hash -857646869, now seen corresponding path program 5 times [2021-11-07 01:46:20,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:20,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565385887] [2021-11-07 01:46:20,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:20,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:20,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:20,951 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:20,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:46:21,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:21,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:21,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:46:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:21,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:22,686 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565385887] [2021-11-07 01:46:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565385887] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:22,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284740159] [2021-11-07 01:46:22,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:22,687 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:22,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:22,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:22,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:46:23,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:23,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:24,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284740159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:24,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:46:24,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8, 8] total 22 [2021-11-07 01:46:24,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879038908] [2021-11-07 01:46:24,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:46:24,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:46:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-11-07 01:46:24,102 INFO L87 Difference]: Start difference. First operand 3201 states and 13534 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:24,601 INFO L93 Difference]: Finished difference Result 6505 states and 26455 transitions. [2021-11-07 01:46:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:46:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:46:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:24,639 INFO L225 Difference]: With dead ends: 6505 [2021-11-07 01:46:24,639 INFO L226 Difference]: Without dead ends: 6346 [2021-11-07 01:46:24,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:46:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2021-11-07 01:46:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 3203. [2021-11-07 01:46:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 4.227670206121174) internal successors, (13537), 3202 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 13537 transitions. [2021-11-07 01:46:24,939 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 13537 transitions. Word has length 33 [2021-11-07 01:46:24,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:24,940 INFO L470 AbstractCegarLoop]: Abstraction has 3203 states and 13537 transitions. [2021-11-07 01:46:24,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:24,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 13537 transitions. [2021-11-07 01:46:24,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:24,953 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:24,953 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:24,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:25,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-07 01:46:25,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:25,370 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:25,371 INFO L85 PathProgramCache]: Analyzing trace with hash 358513121, now seen corresponding path program 1 times [2021-11-07 01:46:25,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:25,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742181108] [2021-11-07 01:46:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:25,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:25,375 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:25,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:46:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:46:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:26,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:26,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:26,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742181108] [2021-11-07 01:46:26,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742181108] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:46:26,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:46:26,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-11-07 01:46:26,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940534261] [2021-11-07 01:46:26,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:46:26,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:26,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:46:26,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:46:26,974 INFO L87 Difference]: Start difference. First operand 3203 states and 13537 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-11-07 01:46:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:27,477 INFO L93 Difference]: Finished difference Result 5583 states and 23255 transitions. [2021-11-07 01:46:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:46:27,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 33 [2021-11-07 01:46:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:27,500 INFO L225 Difference]: With dead ends: 5583 [2021-11-07 01:46:27,500 INFO L226 Difference]: Without dead ends: 5437 [2021-11-07 01:46:27,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:46:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2021-11-07 01:46:27,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 3849. [2021-11-07 01:46:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3848 states have (on average 4.195686070686071) internal successors, (16145), 3848 states have internal predecessors, (16145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 16145 transitions. [2021-11-07 01:46:27,745 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 16145 transitions. Word has length 33 [2021-11-07 01:46:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:27,746 INFO L470 AbstractCegarLoop]: Abstraction has 3849 states and 16145 transitions. [2021-11-07 01:46:27,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2021-11-07 01:46:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 16145 transitions. [2021-11-07 01:46:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:27,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:27,769 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:27,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:27,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,984 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:27,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1701265947, now seen corresponding path program 2 times [2021-11-07 01:46:27,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:27,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057727687] [2021-11-07 01:46:27,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:46:27,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:27,987 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:27,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:46:28,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:46:28,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:29,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:29,518 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:29,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057727687] [2021-11-07 01:46:29,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057727687] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:29,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:29,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:46:29,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096988577] [2021-11-07 01:46:29,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:29,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:29,520 INFO L87 Difference]: Start difference. First operand 3849 states and 16145 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:30,834 INFO L93 Difference]: Finished difference Result 7635 states and 31174 transitions. [2021-11-07 01:46:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:46:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:46:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:30,874 INFO L225 Difference]: With dead ends: 7635 [2021-11-07 01:46:30,875 INFO L226 Difference]: Without dead ends: 6903 [2021-11-07 01:46:30,875 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:46:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2021-11-07 01:46:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 3273. [2021-11-07 01:46:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 4.208435207823961) internal successors, (13770), 3272 states have internal predecessors, (13770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 13770 transitions. [2021-11-07 01:46:31,213 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 13770 transitions. Word has length 33 [2021-11-07 01:46:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:31,213 INFO L470 AbstractCegarLoop]: Abstraction has 3273 states and 13770 transitions. [2021-11-07 01:46:31,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 13770 transitions. [2021-11-07 01:46:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:31,229 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:31,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:31,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:31,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:31,444 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:31,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:31,444 INFO L85 PathProgramCache]: Analyzing trace with hash 281345371, now seen corresponding path program 3 times [2021-11-07 01:46:31,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:31,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1664229257] [2021-11-07 01:46:31,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:46:31,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:31,450 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:31,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:46:32,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-07 01:46:32,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:32,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:32,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:32,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1664229257] [2021-11-07 01:46:32,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1664229257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:32,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:32,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:46:32,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369424657] [2021-11-07 01:46:32,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 01:46:32,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 01:46:32,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:46:32,768 INFO L87 Difference]: Start difference. First operand 3273 states and 13770 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:34,500 INFO L93 Difference]: Finished difference Result 6955 states and 28218 transitions. [2021-11-07 01:46:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:46:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 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 33 [2021-11-07 01:46:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:34,523 INFO L225 Difference]: With dead ends: 6955 [2021-11-07 01:46:34,523 INFO L226 Difference]: Without dead ends: 6883 [2021-11-07 01:46:34,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:46:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6883 states. [2021-11-07 01:46:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6883 to 3691. [2021-11-07 01:46:34,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3691 states, 3690 states have (on average 4.192682926829268) internal successors, (15471), 3690 states have internal predecessors, (15471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 15471 transitions. [2021-11-07 01:46:34,740 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 15471 transitions. Word has length 33 [2021-11-07 01:46:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:34,740 INFO L470 AbstractCegarLoop]: Abstraction has 3691 states and 15471 transitions. [2021-11-07 01:46:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:34,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 15471 transitions. [2021-11-07 01:46:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:34,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:34,757 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:34,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:34,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:34,972 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:34,972 INFO L85 PathProgramCache]: Analyzing trace with hash 776145697, now seen corresponding path program 4 times [2021-11-07 01:46:34,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:34,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552841826] [2021-11-07 01:46:34,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:46:34,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:34,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:34,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:34,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:46:35,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:46:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:35,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:36,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:36,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552841826] [2021-11-07 01:46:36,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552841826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:36,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:36,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-11-07 01:46:36,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796202799] [2021-11-07 01:46:36,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:46:36,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:36,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:46:36,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:46:36,307 INFO L87 Difference]: Start difference. First operand 3691 states and 15471 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:38,056 INFO L93 Difference]: Finished difference Result 8129 states and 32444 transitions. [2021-11-07 01:46:38,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:46:38,057 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-07 01:46:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:38,092 INFO L225 Difference]: With dead ends: 8129 [2021-11-07 01:46:38,092 INFO L226 Difference]: Without dead ends: 7737 [2021-11-07 01:46:38,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-07 01:46:38,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7737 states. [2021-11-07 01:46:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7737 to 3433. [2021-11-07 01:46:38,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 4.160256410256411) internal successors, (14278), 3432 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 14278 transitions. [2021-11-07 01:46:38,337 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 14278 transitions. Word has length 33 [2021-11-07 01:46:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:38,337 INFO L470 AbstractCegarLoop]: Abstraction has 3433 states and 14278 transitions. [2021-11-07 01:46:38,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:38,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 14278 transitions. [2021-11-07 01:46:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 01:46:38,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:38,353 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:38,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:38,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:38,570 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:38,571 INFO L85 PathProgramCache]: Analyzing trace with hash 682792677, now seen corresponding path program 5 times [2021-11-07 01:46:38,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:38,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900091570] [2021-11-07 01:46:38,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:38,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:38,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:38,573 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:38,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:46:39,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:46:39,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:39,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:46:39,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:40,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:40,783 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:40,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900091570] [2021-11-07 01:46:40,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900091570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:40,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502827410] [2021-11-07 01:46:40,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:40,784 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:40,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:40,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:46:43,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:46:43,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:43,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:46:43,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:44,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:46:44,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502827410] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:44,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919001353] [2021-11-07 01:46:44,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:46:44,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:44,742 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:44,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 01:46:45,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-07 01:46:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:46:45,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:46:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:46,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:46,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919001353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:46,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:46:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [9, 9, 9, 9] total 24 [2021-11-07 01:46:46,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61354776] [2021-11-07 01:46:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:46:46,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:46:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:46:46,362 INFO L87 Difference]: Start difference. First operand 3433 states and 14278 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:46,741 INFO L93 Difference]: Finished difference Result 5837 states and 24092 transitions. [2021-11-07 01:46:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:46:46,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 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 33 [2021-11-07 01:46:46,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:46,819 INFO L225 Difference]: With dead ends: 5837 [2021-11-07 01:46:46,819 INFO L226 Difference]: Without dead ends: 5744 [2021-11-07 01:46:46,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-11-07 01:46:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2021-11-07 01:46:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 3434. [2021-11-07 01:46:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 4.159044567433732) internal successors, (14278), 3433 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 14278 transitions. [2021-11-07 01:46:46,981 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 14278 transitions. Word has length 33 [2021-11-07 01:46:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:46,981 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 14278 transitions. [2021-11-07 01:46:46,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 14278 transitions. [2021-11-07 01:46:46,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:46:46,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:46,997 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:46:47,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:47,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:47,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:46:47,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:47,612 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:46:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:47,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1256992881, now seen corresponding path program 1 times [2021-11-07 01:46:47,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:47,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107075765] [2021-11-07 01:46:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:47,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:47,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:47,615 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:47,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:46:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:46:48,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:46:48,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:46:49,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:49,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107075765] [2021-11-07 01:46:49,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107075765] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:49,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1579987957] [2021-11-07 01:46:49,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:49,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:46:49,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:46:49,163 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:46:49,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:46:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:50,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:46:50,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:50,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1579987957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:50,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178832204] [2021-11-07 01:46:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:50,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:46:50,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:46:50,767 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:46:50,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 01:46:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:51,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:46:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:52,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:46:52,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178832204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:46:52,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:46:52,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 9, 9] total 27 [2021-11-07 01:46:52,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101485886] [2021-11-07 01:46:52,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 01:46:52,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 01:46:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:46:52,822 INFO L87 Difference]: Start difference. First operand 3434 states and 14278 transitions. Second operand has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:59,647 INFO L93 Difference]: Finished difference Result 13144 states and 52708 transitions. [2021-11-07 01:46:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 01:46:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:46:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:59,772 INFO L225 Difference]: With dead ends: 13144 [2021-11-07 01:46:59,772 INFO L226 Difference]: Without dead ends: 12773 [2021-11-07 01:46:59,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2655 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1563, Invalid=6993, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 01:46:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12773 states. [2021-11-07 01:47:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12773 to 2239. [2021-11-07 01:47:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2238 states have (on average 4.059874888293119) internal successors, (9086), 2238 states have internal predecessors, (9086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 9086 transitions. [2021-11-07 01:47:00,031 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 9086 transitions. Word has length 34 [2021-11-07 01:47:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:00,032 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 9086 transitions. [2021-11-07 01:47:00,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.75) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 9086 transitions. [2021-11-07 01:47:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 01:47:00,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:00,043 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:00,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:00,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:00,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:00,649 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:00,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:00,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1328495429, now seen corresponding path program 1 times [2021-11-07 01:47:00,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:00,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143821779] [2021-11-07 01:47:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:00,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:00,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:47:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:47:01,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:01,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:02,179 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:02,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143821779] [2021-11-07 01:47:02,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143821779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:02,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998609385] [2021-11-07 01:47:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:02,179 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:02,180 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:02,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:47:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:03,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:47:03,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:03,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:03,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998609385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:03,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132489466] [2021-11-07 01:47:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:03,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:03,738 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:03,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 01:47:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:47:04,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:04,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:47:05,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132489466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:05,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:05,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 8] total 20 [2021-11-07 01:47:05,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133380133] [2021-11-07 01:47:05,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 01:47:05,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 01:47:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-11-07 01:47:05,395 INFO L87 Difference]: Start difference. First operand 2239 states and 9086 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:07,031 INFO L93 Difference]: Finished difference Result 4891 states and 19482 transitions. [2021-11-07 01:47:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 01:47:07,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 01:47:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:07,046 INFO L225 Difference]: With dead ends: 4891 [2021-11-07 01:47:07,047 INFO L226 Difference]: Without dead ends: 4410 [2021-11-07 01:47:07,047 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:47:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4410 states. [2021-11-07 01:47:07,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4410 to 1642. [2021-11-07 01:47:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1641 states have (on average 4.072516758074345) internal successors, (6683), 1641 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 6683 transitions. [2021-11-07 01:47:07,151 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 6683 transitions. Word has length 34 [2021-11-07 01:47:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:07,151 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 6683 transitions. [2021-11-07 01:47:07,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 6683 transitions. [2021-11-07 01:47:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:07,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:07,159 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:07,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:07,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:07,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:07,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:07,779 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash -298358777, now seen corresponding path program 1 times [2021-11-07 01:47:07,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:07,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1715563235] [2021-11-07 01:47:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:07,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:07,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:07,782 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:07,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:47:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:47:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:09,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:09,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:09,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1715563235] [2021-11-07 01:47:09,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1715563235] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-07 01:47:09,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 01:47:09,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-07 01:47:09,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118920554] [2021-11-07 01:47:09,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:09,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:47:09,888 INFO L87 Difference]: Start difference. First operand 1642 states and 6683 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-11-07 01:47:10,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:10,735 INFO L93 Difference]: Finished difference Result 2438 states and 10047 transitions. [2021-11-07 01:47:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:47:10,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2021-11-07 01:47:10,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:10,745 INFO L225 Difference]: With dead ends: 2438 [2021-11-07 01:47:10,746 INFO L226 Difference]: Without dead ends: 2438 [2021-11-07 01:47:10,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:47:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-11-07 01:47:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1872. [2021-11-07 01:47:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.113308391234634) internal successors, (7696), 1871 states have internal predecessors, (7696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7696 transitions. [2021-11-07 01:47:10,816 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7696 transitions. Word has length 37 [2021-11-07 01:47:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:10,819 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 7696 transitions. [2021-11-07 01:47:10,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-11-07 01:47:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7696 transitions. [2021-11-07 01:47:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:10,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:10,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:10,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:11,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,028 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:11,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -780928873, now seen corresponding path program 1 times [2021-11-07 01:47:11,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:11,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413561802] [2021-11-07 01:47:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:11,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:11,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:11,031 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:47:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:47:12,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:12,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:13,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:13,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413561802] [2021-11-07 01:47:13,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413561802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:13,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159146911] [2021-11-07 01:47:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:13,341 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:13,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:13,342 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:13,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:47:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:47:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:15,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:15,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159146911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:15,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262813948] [2021-11-07 01:47:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:15,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:15,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:15,636 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:15,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 01:47:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:16,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 01:47:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:17,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:17,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262813948] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:17,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:47:17,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 8, 8] total 19 [2021-11-07 01:47:17,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687318074] [2021-11-07 01:47:17,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 01:47:17,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 01:47:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:47:17,784 INFO L87 Difference]: Start difference. First operand 1872 states and 7696 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:19,996 INFO L93 Difference]: Finished difference Result 6244 states and 25890 transitions. [2021-11-07 01:47:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:47:19,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 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 37 [2021-11-07 01:47:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:20,025 INFO L225 Difference]: With dead ends: 6244 [2021-11-07 01:47:20,025 INFO L226 Difference]: Without dead ends: 6244 [2021-11-07 01:47:20,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2021-11-07 01:47:20,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6244 states. [2021-11-07 01:47:20,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6244 to 1904. [2021-11-07 01:47:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 4.082501313715187) internal successors, (7769), 1903 states have internal predecessors, (7769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 7769 transitions. [2021-11-07 01:47:20,176 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 7769 transitions. Word has length 37 [2021-11-07 01:47:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:20,176 INFO L470 AbstractCegarLoop]: Abstraction has 1904 states and 7769 transitions. [2021-11-07 01:47:20,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 7769 transitions. [2021-11-07 01:47:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:20,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:20,186 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:20,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:20,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:20,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:20,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:20,802 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:20,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash -255322627, now seen corresponding path program 2 times [2021-11-07 01:47:20,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:20,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239637231] [2021-11-07 01:47:20,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:47:20,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:20,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:20,807 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:47:22,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:47:22,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:22,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:22,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:22,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:22,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:22,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239637231] [2021-11-07 01:47:22,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239637231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:22,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:22,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:47:22,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799318997] [2021-11-07 01:47:22,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:22,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:22,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:22,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:47:22,847 INFO L87 Difference]: Start difference. First operand 1904 states and 7769 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2021-11-07 01:47:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:23,495 INFO L93 Difference]: Finished difference Result 3016 states and 12380 transitions. [2021-11-07 01:47:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) Word has length 37 [2021-11-07 01:47:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:23,505 INFO L225 Difference]: With dead ends: 3016 [2021-11-07 01:47:23,505 INFO L226 Difference]: Without dead ends: 2954 [2021-11-07 01:47:23,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:47:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-11-07 01:47:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2090. [2021-11-07 01:47:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 4.105313547151748) internal successors, (8576), 2089 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 8576 transitions. [2021-11-07 01:47:23,571 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 8576 transitions. Word has length 37 [2021-11-07 01:47:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:23,571 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 8576 transitions. [2021-11-07 01:47:23,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2021-11-07 01:47:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 8576 transitions. [2021-11-07 01:47:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:23,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:23,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:23,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:23,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:23,788 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1098468569, now seen corresponding path program 3 times [2021-11-07 01:47:23,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:23,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375536754] [2021-11-07 01:47:23,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:23,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:23,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:23,790 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:23,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:47:25,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:47:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:47:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:25,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:26,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:26,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375536754] [2021-11-07 01:47:26,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375536754] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:26,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098106206] [2021-11-07 01:47:26,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:26,162 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:47:26,172 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:47:26,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:47:28,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:47:28,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:47:28,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:28,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:28,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:47:28,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098106206] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:47:28,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386402594] [2021-11-07 01:47:28,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 01:47:28,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:47:28,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:28,972 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:47:28,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:47:31,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 01:47:31,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:31,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:47:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:32,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386402594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:32,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-07 01:47:32,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [6, 6, 6, 6] total 22 [2021-11-07 01:47:32,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232101520] [2021-11-07 01:47:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:47:32,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:47:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:47:32,710 INFO L87 Difference]: Start difference. First operand 2090 states and 8576 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:35,529 INFO L93 Difference]: Finished difference Result 6290 states and 25227 transitions. [2021-11-07 01:47:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 01:47:35,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:47:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:35,560 INFO L225 Difference]: With dead ends: 6290 [2021-11-07 01:47:35,561 INFO L226 Difference]: Without dead ends: 6290 [2021-11-07 01:47:35,562 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 01:47:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6290 states. [2021-11-07 01:47:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6290 to 2666. [2021-11-07 01:47:35,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 4.309943714821763) internal successors, (11486), 2665 states have internal predecessors, (11486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 11486 transitions. [2021-11-07 01:47:35,719 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 11486 transitions. Word has length 37 [2021-11-07 01:47:35,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:35,720 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 11486 transitions. [2021-11-07 01:47:35,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 11486 transitions. [2021-11-07 01:47:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:35,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:35,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:35,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:35,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:36,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:36,352 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1212063233, now seen corresponding path program 4 times [2021-11-07 01:47:36,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:36,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819778283] [2021-11-07 01:47:36,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 01:47:36,355 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:36,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:36,356 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:36,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:47:37,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 01:47:37,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:38,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:38,267 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:38,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819778283] [2021-11-07 01:47:38,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819778283] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:38,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:38,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2021-11-07 01:47:38,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981243183] [2021-11-07 01:47:38,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:38,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:47:38,269 INFO L87 Difference]: Start difference. First operand 2666 states and 11486 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:39,065 INFO L93 Difference]: Finished difference Result 4168 states and 17595 transitions. [2021-11-07 01:47:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:47:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:47:39,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:39,093 INFO L225 Difference]: With dead ends: 4168 [2021-11-07 01:47:39,093 INFO L226 Difference]: Without dead ends: 4106 [2021-11-07 01:47:39,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:47:39,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-11-07 01:47:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 2604. [2021-11-07 01:47:39,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.309258547829428) internal successors, (11217), 2603 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11217 transitions. [2021-11-07 01:47:39,257 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11217 transitions. Word has length 37 [2021-11-07 01:47:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:39,257 INFO L470 AbstractCegarLoop]: Abstraction has 2604 states and 11217 transitions. [2021-11-07 01:47:39,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11217 transitions. [2021-11-07 01:47:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:39,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:39,272 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:39,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:39,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:39,485 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash -2055209175, now seen corresponding path program 5 times [2021-11-07 01:47:39,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:39,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332543795] [2021-11-07 01:47:39,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 01:47:39,487 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:39,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:39,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:39,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:47:41,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 01:47:41,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:41,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:41,488 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:41,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332543795] [2021-11-07 01:47:41,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332543795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:41,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:41,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:47:41,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312457971] [2021-11-07 01:47:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:47:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:47:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:47:41,490 INFO L87 Difference]: Start difference. First operand 2604 states and 11217 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-11-07 01:47:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:42,152 INFO L93 Difference]: Finished difference Result 4882 states and 20329 transitions. [2021-11-07 01:47:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:47:42,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) Word has length 37 [2021-11-07 01:47:42,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:42,175 INFO L225 Difference]: With dead ends: 4882 [2021-11-07 01:47:42,175 INFO L226 Difference]: Without dead ends: 4882 [2021-11-07 01:47:42,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:47:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-11-07 01:47:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 2608. [2021-11-07 01:47:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2607 states have (on average 4.307249712313004) internal successors, (11229), 2607 states have internal predecessors, (11229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 11229 transitions. [2021-11-07 01:47:42,340 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 11229 transitions. Word has length 37 [2021-11-07 01:47:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:42,340 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 11229 transitions. [2021-11-07 01:47:42,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-11-07 01:47:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 11229 transitions. [2021-11-07 01:47:42,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:42,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:42,356 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:42,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:42,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:42,570 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1911294839, now seen corresponding path program 6 times [2021-11-07 01:47:42,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:42,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309578438] [2021-11-07 01:47:42,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 01:47:42,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:42,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:42,573 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:42,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:47:44,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-07 01:47:44,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:47:44,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:44,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:44,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:44,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:44,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309578438] [2021-11-07 01:47:44,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309578438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:44,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:44,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 01:47:44,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267877144] [2021-11-07 01:47:44,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:47:44,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:44,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:47:44,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:47:44,741 INFO L87 Difference]: Start difference. First operand 2608 states and 11229 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:45,350 INFO L93 Difference]: Finished difference Result 3722 states and 15944 transitions. [2021-11-07 01:47:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:47:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 01:47:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:45,368 INFO L225 Difference]: With dead ends: 3722 [2021-11-07 01:47:45,368 INFO L226 Difference]: Without dead ends: 3598 [2021-11-07 01:47:45,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:47:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3598 states. [2021-11-07 01:47:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3598 to 2484. [2021-11-07 01:47:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 2483 states have (on average 4.330648409182441) internal successors, (10753), 2483 states have internal predecessors, (10753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 10753 transitions. [2021-11-07 01:47:45,505 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 10753 transitions. Word has length 37 [2021-11-07 01:47:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:45,506 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 10753 transitions. [2021-11-07 01:47:45,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 10753 transitions. [2021-11-07 01:47:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 01:47:45,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:45,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:45,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:45,736 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:45,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 406860075, now seen corresponding path program 7 times [2021-11-07 01:47:45,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:45,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1840971056] [2021-11-07 01:47:45,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 01:47:45,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:45,738 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:45,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:47:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:47,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:47,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:47:47,797 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:47,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1840971056] [2021-11-07 01:47:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1840971056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:47,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:47,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:47:47,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593826106] [2021-11-07 01:47:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:47:47,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:47:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:47:47,799 INFO L87 Difference]: Start difference. First operand 2484 states and 10753 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 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) [2021-11-07 01:47:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:48,614 INFO L93 Difference]: Finished difference Result 4186 states and 18019 transitions. [2021-11-07 01:47:48,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 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) Word has length 37 [2021-11-07 01:47:48,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:48,634 INFO L225 Difference]: With dead ends: 4186 [2021-11-07 01:47:48,634 INFO L226 Difference]: Without dead ends: 4186 [2021-11-07 01:47:48,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:47:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-11-07 01:47:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 1904. [2021-11-07 01:47:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 4.115081450341566) internal successors, (7831), 1903 states have internal predecessors, (7831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 7831 transitions. [2021-11-07 01:47:48,804 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 7831 transitions. Word has length 37 [2021-11-07 01:47:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:48,805 INFO L470 AbstractCegarLoop]: Abstraction has 1904 states and 7831 transitions. [2021-11-07 01:47:48,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 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) [2021-11-07 01:47:48,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 7831 transitions. [2021-11-07 01:47:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-07 01:47:48,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:48,815 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:47:48,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:49,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:49,029 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-11-07 01:47:49,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:49,030 INFO L85 PathProgramCache]: Analyzing trace with hash -971087722, now seen corresponding path program 1 times [2021-11-07 01:47:49,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:49,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794692575] [2021-11-07 01:47:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:49,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:49,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:49,033 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:49,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fdb0ee4-6b7c-4668-ab82-1937c4059984/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:47:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:51,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 01:47:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates...