./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:02:20,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:02:20,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:02:20,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:02:20,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:02:20,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:02:20,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:02:20,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:02:20,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:02:20,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:02:20,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:02:20,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:02:20,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:02:20,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:02:20,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:02:20,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:02:20,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:02:20,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:02:20,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:02:20,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:02:20,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:02:20,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:02:20,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:02:20,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:02:20,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:02:20,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:02:20,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:02:20,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:02:20,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:02:20,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:02:20,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:02:20,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:02:20,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:02:20,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:02:20,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:02:20,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:02:20,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:02:20,845 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:02:20,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:02:20,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:02:20,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:02:20,848 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:02:20,883 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:02:20,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:02:20,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:02:20,885 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:02:20,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:02:20,885 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:02:20,886 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:02:20,886 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:02:20,886 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:02:20,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:02:20,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:02:20,887 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:02:20,887 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:02:20,887 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:02:20,888 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:02:20,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:02:20,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:02:20,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:02:20,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:02:20,889 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:02:20,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:02:20,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:02:20,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:02:20,890 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:02:20,890 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:02:20,891 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:02:20,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:02:20,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:02:20,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:02:20,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:02:20,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:02:20,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:02:20,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:02:20,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:02:20,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:02:20,893 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:02:20,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:02:20,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:02:20,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:02:20,894 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_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-11-03 04:02:21,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:02:21,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:02:21,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:02:21,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:02:21,219 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:02:21,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-03 04:02:21,295 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/0484c56c3/a2adb00729b34456a87cffeb6015e173/FLAG39557bd3d [2021-11-03 04:02:21,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:02:21,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-03 04:02:22,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/0484c56c3/a2adb00729b34456a87cffeb6015e173/FLAG39557bd3d [2021-11-03 04:02:22,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/0484c56c3/a2adb00729b34456a87cffeb6015e173 [2021-11-03 04:02:22,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:02:22,146 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:02:22,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:02:22,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:02:22,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:02:22,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:22" (1/1) ... [2021-11-03 04:02:22,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@780397b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:22, skipping insertion in model container [2021-11-03 04:02:22,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:22" (1/1) ... [2021-11-03 04:02:22,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:02:22,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:02:22,702 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_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-03 04:02:23,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:02:23,049 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:02:23,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24bedcfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:23, skipping insertion in model container [2021-11-03 04:02:23,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:02:23,050 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:02:23,052 INFO L168 Benchmark]: Toolchain (without parser) took 904.56 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 50.9 MB in the beginning and 64.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2021-11-03 04:02:23,053 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 57.9 MB in the beginning and 57.8 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:02:23,054 INFO L168 Benchmark]: CACSL2BoogieTranslator took 902.06 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 64.8 MB in the end (delta: -14.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:02:23,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 88.1 MB. Free memory was 57.9 MB in the beginning and 57.8 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 902.06 ms. Allocated memory was 88.1 MB in the beginning and 109.1 MB in the end (delta: 21.0 MB). Free memory was 50.7 MB in the beginning and 64.8 MB in the end (delta: -14.0 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:02:25,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:02:25,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:02:25,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:02:25,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:02:25,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:02:25,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:02:25,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:02:25,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:02:25,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:02:25,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:02:25,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:02:25,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:02:25,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:02:25,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:02:25,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:02:25,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:02:25,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:02:25,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:02:25,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:02:25,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:02:25,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:02:25,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:02:25,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:02:25,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:02:25,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:02:25,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:02:25,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:02:25,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:02:25,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:02:25,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:02:25,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:02:25,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:02:25,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:02:25,461 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:02:25,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:02:25,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:02:25,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:02:25,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:02:25,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:02:25,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:02:25,476 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:02:25,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:02:25,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:02:25,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:02:25,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:02:25,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:02:25,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:02:25,525 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:02:25,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:02:25,526 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:02:25,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:02:25,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:02:25,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:02:25,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:02:25,530 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:02:25,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:02:25,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:02:25,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:02:25,531 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:02:25,531 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:02:25,531 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:02:25,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:02:25,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:02:25,532 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:02:25,532 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:02:25,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:02:25,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:02:25,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:02:25,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:02:25,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:02:25,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:02:25,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:02:25,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:02:25,535 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:02:25,535 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:02:25,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:02:25,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:02:25,536 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_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14558cb0aef5bf60b4a230892060936885d87372f6515d5d8ad78f7b805ad735 [2021-11-03 04:02:25,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:02:25,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:02:25,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:02:25,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:02:25,946 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:02:25,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-03 04:02:26,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/6bb5f2630/292b229a9fe0481b917a6b452c9ec625/FLAGefa2327b0 [2021-11-03 04:02:26,748 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:02:26,749 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i [2021-11-03 04:02:26,770 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/6bb5f2630/292b229a9fe0481b917a6b452c9ec625/FLAGefa2327b0 [2021-11-03 04:02:26,963 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/data/6bb5f2630/292b229a9fe0481b917a6b452c9ec625 [2021-11-03 04:02:26,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:02:26,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:02:26,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:02:26,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:02:26,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:02:26,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:26" (1/1) ... [2021-11-03 04:02:26,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bfa6db3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:26, skipping insertion in model container [2021-11-03 04:02:26,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:02:26" (1/1) ... [2021-11-03 04:02:26,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:02:27,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:02:27,518 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_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-03 04:02:27,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:02:27,835 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:02:27,852 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:02:27,875 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_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-03 04:02:27,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:02:28,009 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:02:28,034 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_3932bcd9-98e2-4934-8869-8e357e843cca/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-2.i[33022,33035] [2021-11-03 04:02:28,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:02:28,165 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:02:28,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28 WrapperNode [2021-11-03 04:02:28,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:02:28,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:02:28,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:02:28,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:02:28,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:02:28,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:02:28,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:02:28,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:02:28,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:02:28,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:02:28,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:02:28,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:02:28,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (1/1) ... [2021-11-03 04:02:28,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:02:28,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:02:28,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:02:28,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:02:28,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:02:28,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:02:28,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:02:28,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:02:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:02:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 04:02:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:02:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:02:28,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:02:28,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:02:28,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:02:28,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:02:38,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:02:38,831 INFO L299 CfgBuilder]: Removed 216 assume(true) statements. [2021-11-03 04:02:38,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:38 BoogieIcfgContainer [2021-11-03 04:02:38,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:02:38,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:02:38,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:02:38,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:02:38,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:02:26" (1/3) ... [2021-11-03 04:02:38,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef28dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:38, skipping insertion in model container [2021-11-03 04:02:38,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:02:28" (2/3) ... [2021-11-03 04:02:38,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef28dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:02:38, skipping insertion in model container [2021-11-03 04:02:38,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:02:38" (3/3) ... [2021-11-03 04:02:38,845 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-2.i [2021-11-03 04:02:38,850 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:02:38,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1110 error locations. [2021-11-03 04:02:38,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:02:38,902 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:02:38,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1110 error locations. [2021-11-03 04:02:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:02:38,975 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:02:38,976 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:02:38,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:02:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:02:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 04:02:38,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:02:38,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2031763652] [2021-11-03 04:02:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:02:38,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:02:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:02:38,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:02:39,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:02:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:02:39,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:02:39,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:02:39,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:02:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:39,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:39,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:39,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2031763652] [2021-11-03 04:02:39,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2031763652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:39,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:39,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:02:39,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112448954] [2021-11-03 04:02:39,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:02:39,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:39,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:02:39,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:02:39,339 INFO L87 Difference]: Start difference. First operand has 2322 states, 1211 states have (on average 2.199009083402147) internal successors, (2663), 2321 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:02:43,895 INFO L93 Difference]: Finished difference Result 3006 states and 3198 transitions. [2021-11-03 04:02:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:02:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:02:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:02:43,934 INFO L225 Difference]: With dead ends: 3006 [2021-11-03 04:02:43,935 INFO L226 Difference]: Without dead ends: 3004 [2021-11-03 04:02:43,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:02:43,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3004 states. [2021-11-03 04:02:44,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3004 to 2470. [2021-11-03 04:02:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 1383 states have (on average 2.0325379609544467) internal successors, (2811), 2469 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 2811 transitions. [2021-11-03 04:02:44,088 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 2811 transitions. Word has length 3 [2021-11-03 04:02:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:02:44,088 INFO L470 AbstractCegarLoop]: Abstraction has 2470 states and 2811 transitions. [2021-11-03 04:02:44,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 2811 transitions. [2021-11-03 04:02:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 04:02:44,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:02:44,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 04:02:44,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:02:44,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:02:44,294 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:02:44,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:02:44,295 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 04:02:44,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:02:44,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747445805] [2021-11-03 04:02:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:02:44,297 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:02:44,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:02:44,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:02:44,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:02:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:02:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:02:44,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:02:44,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:02:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:44,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:44,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:44,621 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:44,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747445805] [2021-11-03 04:02:44,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747445805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:44,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:44,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:02:44,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300444680] [2021-11-03 04:02:44,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:02:44,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:44,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:02:44,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:02:44,626 INFO L87 Difference]: Start difference. First operand 2470 states and 2811 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:02:54,843 INFO L93 Difference]: Finished difference Result 3838 states and 4302 transitions. [2021-11-03 04:02:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:02:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 04:02:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:02:54,864 INFO L225 Difference]: With dead ends: 3838 [2021-11-03 04:02:54,864 INFO L226 Difference]: Without dead ends: 3838 [2021-11-03 04:02:54,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:02:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3838 states. [2021-11-03 04:02:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3838 to 2634. [2021-11-03 04:02:54,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 1559 states have (on average 2.0224502886465685) internal successors, (3153), 2633 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3153 transitions. [2021-11-03 04:02:54,936 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3153 transitions. Word has length 3 [2021-11-03 04:02:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:02:54,937 INFO L470 AbstractCegarLoop]: Abstraction has 2634 states and 3153 transitions. [2021-11-03 04:02:54,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3153 transitions. [2021-11-03 04:02:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:02:54,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:02:54,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:02:54,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:02:55,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:02:55,149 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:02:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:02:55,151 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 04:02:55,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:02:55,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930028332] [2021-11-03 04:02:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:02:55,155 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:02:55,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:02:55,157 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:02:55,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:02:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:02:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:02:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:02:55,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:02:55,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:55,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:55,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:55,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930028332] [2021-11-03 04:02:55,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930028332] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:55,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:55,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:02:55,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459140557] [2021-11-03 04:02:55,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:02:55,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:02:55,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:02:55,447 INFO L87 Difference]: Start difference. First operand 2634 states and 3153 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:58,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:02:58,856 INFO L93 Difference]: Finished difference Result 3440 states and 3971 transitions. [2021-11-03 04:02:58,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:02:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:02:58,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:02:58,872 INFO L225 Difference]: With dead ends: 3440 [2021-11-03 04:02:58,873 INFO L226 Difference]: Without dead ends: 3440 [2021-11-03 04:02:58,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:02:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-03 04:02:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2543. [2021-11-03 04:02:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2543 states, 1559 states have (on average 1.9422706863373957) internal successors, (3028), 2542 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2543 states to 2543 states and 3028 transitions. [2021-11-03 04:02:58,933 INFO L78 Accepts]: Start accepts. Automaton has 2543 states and 3028 transitions. Word has length 8 [2021-11-03 04:02:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:02:58,934 INFO L470 AbstractCegarLoop]: Abstraction has 2543 states and 3028 transitions. [2021-11-03 04:02:58,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:02:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2543 states and 3028 transitions. [2021-11-03 04:02:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:02:58,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:02:58,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:02:58,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-03 04:02:59,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:02:59,146 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:02:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:02:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 04:02:59,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:02:59,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111533669] [2021-11-03 04:02:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:02:59,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:02:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:02:59,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:02:59,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:02:59,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:02:59,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:02:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:02:59,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:02:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:59,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:02:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:02:59,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:02:59,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111533669] [2021-11-03 04:02:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111533669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:02:59,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:02:59,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 04:02:59,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490507497] [2021-11-03 04:02:59,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:02:59,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:02:59,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:02:59,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:02:59,501 INFO L87 Difference]: Start difference. First operand 2543 states and 3028 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:08,025 INFO L93 Difference]: Finished difference Result 3569 states and 4002 transitions. [2021-11-03 04:03:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:03:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:03:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:08,041 INFO L225 Difference]: With dead ends: 3569 [2021-11-03 04:03:08,041 INFO L226 Difference]: Without dead ends: 3569 [2021-11-03 04:03:08,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:08,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-11-03 04:03:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 2535. [2021-11-03 04:03:08,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2535 states, 1561 states have (on average 1.9269698910954516) internal successors, (3008), 2534 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2535 states to 2535 states and 3008 transitions. [2021-11-03 04:03:08,098 INFO L78 Accepts]: Start accepts. Automaton has 2535 states and 3008 transitions. Word has length 8 [2021-11-03 04:03:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:08,098 INFO L470 AbstractCegarLoop]: Abstraction has 2535 states and 3008 transitions. [2021-11-03 04:03:08,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2535 states and 3008 transitions. [2021-11-03 04:03:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:03:08,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:08,100 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:03:08,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:08,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:08,311 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 04:03:08,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:08,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944117703] [2021-11-03 04:03:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:08,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:08,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:08,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:08,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:03:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:08,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:03:08,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:08,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:08,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:08,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944117703] [2021-11-03 04:03:08,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944117703] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:08,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:08,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:03:08,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116919013] [2021-11-03 04:03:08,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:08,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:08,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:08,591 INFO L87 Difference]: Start difference. First operand 2535 states and 3008 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:08,659 INFO L93 Difference]: Finished difference Result 2493 states and 2965 transitions. [2021-11-03 04:03:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:03:08,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 04:03:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:08,673 INFO L225 Difference]: With dead ends: 2493 [2021-11-03 04:03:08,673 INFO L226 Difference]: Without dead ends: 2493 [2021-11-03 04:03:08,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-11-03 04:03:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2493. [2021-11-03 04:03:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 1543 states have (on average 1.9215813350615685) internal successors, (2965), 2492 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 2965 transitions. [2021-11-03 04:03:08,752 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 2965 transitions. Word has length 11 [2021-11-03 04:03:08,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:08,754 INFO L470 AbstractCegarLoop]: Abstraction has 2493 states and 2965 transitions. [2021-11-03 04:03:08,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 2965 transitions. [2021-11-03 04:03:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:03:08,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:08,755 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:03:08,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:08,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:08,970 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 04:03:08,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:08,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237871470] [2021-11-03 04:03:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:08,973 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:08,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:08,974 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:08,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 04:03:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:09,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:09,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237871470] [2021-11-03 04:03:09,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237871470] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:09,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:09,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:03:09,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992531750] [2021-11-03 04:03:09,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:03:09,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:03:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:03:09,264 INFO L87 Difference]: Start difference. First operand 2493 states and 2965 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:09,366 INFO L93 Difference]: Finished difference Result 2472 states and 2937 transitions. [2021-11-03 04:03:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:03:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:03:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:09,376 INFO L225 Difference]: With dead ends: 2472 [2021-11-03 04:03:09,376 INFO L226 Difference]: Without dead ends: 2472 [2021-11-03 04:03:09,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:03:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-11-03 04:03:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2471. [2021-11-03 04:03:09,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 1535 states have (on average 1.9127035830618893) internal successors, (2936), 2470 states have internal predecessors, (2936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 2936 transitions. [2021-11-03 04:03:09,424 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 2936 transitions. Word has length 13 [2021-11-03 04:03:09,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:09,424 INFO L470 AbstractCegarLoop]: Abstraction has 2471 states and 2936 transitions. [2021-11-03 04:03:09,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 2936 transitions. [2021-11-03 04:03:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:03:09,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:09,426 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:03:09,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:09,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:09,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:09,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 04:03:09,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:09,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732193581] [2021-11-03 04:03:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:09,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:09,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:09,640 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:09,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:03:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:03:09,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:09,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:09,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:09,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732193581] [2021-11-03 04:03:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732193581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:09,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:09,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:03:09,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121901839] [2021-11-03 04:03:09,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:09,946 INFO L87 Difference]: Start difference. First operand 2471 states and 2936 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:10,009 INFO L93 Difference]: Finished difference Result 3981 states and 4554 transitions. [2021-11-03 04:03:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:03:10,010 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:03:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:10,029 INFO L225 Difference]: With dead ends: 3981 [2021-11-03 04:03:10,029 INFO L226 Difference]: Without dead ends: 3981 [2021-11-03 04:03:10,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-11-03 04:03:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 2393. [2021-11-03 04:03:10,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 1481 states have (on average 1.8953409858203916) internal successors, (2807), 2392 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 2807 transitions. [2021-11-03 04:03:10,085 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 2807 transitions. Word has length 20 [2021-11-03 04:03:10,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:10,086 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 2807 transitions. [2021-11-03 04:03:10,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 2807 transitions. [2021-11-03 04:03:10,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:03:10,088 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:10,088 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:03:10,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:10,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:10,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:10,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 04:03:10,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:10,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017644161] [2021-11-03 04:03:10,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:10,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:10,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:10,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:10,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:03:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:03:10,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:10,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:10,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:10,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017644161] [2021-11-03 04:03:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017644161] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:10,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:10,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:03:10,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986258972] [2021-11-03 04:03:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:10,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:10,638 INFO L87 Difference]: Start difference. First operand 2393 states and 2807 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:10,697 INFO L93 Difference]: Finished difference Result 3904 states and 4477 transitions. [2021-11-03 04:03:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:03:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:03:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:10,714 INFO L225 Difference]: With dead ends: 3904 [2021-11-03 04:03:10,714 INFO L226 Difference]: Without dead ends: 3904 [2021-11-03 04:03:10,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:10,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2021-11-03 04:03:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2351. [2021-11-03 04:03:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 1463 states have (on average 1.8892686261107314) internal successors, (2764), 2350 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 2764 transitions. [2021-11-03 04:03:10,761 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 2764 transitions. Word has length 20 [2021-11-03 04:03:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:10,762 INFO L470 AbstractCegarLoop]: Abstraction has 2351 states and 2764 transitions. [2021-11-03 04:03:10,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:10,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 2764 transitions. [2021-11-03 04:03:10,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:03:10,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:10,763 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] [2021-11-03 04:03:10,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:03:10,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:10,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 04:03:10,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:10,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559259149] [2021-11-03 04:03:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:10,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:10,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:10,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:10,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:03:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:11,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:11,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:11,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:11,337 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:11,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559259149] [2021-11-03 04:03:11,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559259149] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:11,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:11,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:03:11,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664130314] [2021-11-03 04:03:11,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:03:11,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:03:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:03:11,340 INFO L87 Difference]: Start difference. First operand 2351 states and 2764 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:11,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:11,428 INFO L93 Difference]: Finished difference Result 3862 states and 4384 transitions. [2021-11-03 04:03:11,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:03:11,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:03:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:11,441 INFO L225 Difference]: With dead ends: 3862 [2021-11-03 04:03:11,441 INFO L226 Difference]: Without dead ends: 3862 [2021-11-03 04:03:11,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:03:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-11-03 04:03:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2313. [2021-11-03 04:03:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1439 states have (on average 1.8603196664350243) internal successors, (2677), 2312 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2677 transitions. [2021-11-03 04:03:11,490 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2677 transitions. Word has length 22 [2021-11-03 04:03:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:11,490 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2677 transitions. [2021-11-03 04:03:11,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2677 transitions. [2021-11-03 04:03:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:03:11,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:11,492 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] [2021-11-03 04:03:11,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:11,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:11,703 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 04:03:11,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:11,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697616848] [2021-11-03 04:03:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:11,705 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:11,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:11,706 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:11,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:03:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:11,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:12,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:12,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697616848] [2021-11-03 04:03:12,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697616848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:12,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:12,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 04:03:12,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495943978] [2021-11-03 04:03:12,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:03:12,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:12,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:03:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:03:12,121 INFO L87 Difference]: Start difference. First operand 2313 states and 2677 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:12,262 INFO L93 Difference]: Finished difference Result 3823 states and 4333 transitions. [2021-11-03 04:03:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:03:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:03:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:12,269 INFO L225 Difference]: With dead ends: 3823 [2021-11-03 04:03:12,269 INFO L226 Difference]: Without dead ends: 3823 [2021-11-03 04:03:12,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:03:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-11-03 04:03:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 2291. [2021-11-03 04:03:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 1431 states have (on average 1.8504542278127183) internal successors, (2648), 2290 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 2648 transitions. [2021-11-03 04:03:12,332 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 2648 transitions. Word has length 22 [2021-11-03 04:03:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:12,333 INFO L470 AbstractCegarLoop]: Abstraction has 2291 states and 2648 transitions. [2021-11-03 04:03:12,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 2648 transitions. [2021-11-03 04:03:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:03:12,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:12,337 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] [2021-11-03 04:03:12,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:12,538 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 04:03:12,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:12,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746026190] [2021-11-03 04:03:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:12,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:12,539 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:12,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:03:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:12,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:12,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:03:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:12,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:13,038 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:13,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746026190] [2021-11-03 04:03:13,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746026190] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:13,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:13,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:03:13,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000191036] [2021-11-03 04:03:13,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:13,040 INFO L87 Difference]: Start difference. First operand 2291 states and 2648 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:16,557 INFO L93 Difference]: Finished difference Result 2746 states and 3014 transitions. [2021-11-03 04:03:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:03:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-03 04:03:16,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:16,564 INFO L225 Difference]: With dead ends: 2746 [2021-11-03 04:03:16,564 INFO L226 Difference]: Without dead ends: 2746 [2021-11-03 04:03:16,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:03:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-03 04:03:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2287. [2021-11-03 04:03:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 1431 states have (on average 1.8476589797344514) internal successors, (2644), 2286 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 2644 transitions. [2021-11-03 04:03:16,598 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 2644 transitions. Word has length 27 [2021-11-03 04:03:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:16,598 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 2644 transitions. [2021-11-03 04:03:16,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 2644 transitions. [2021-11-03 04:03:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 04:03:16,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:16,600 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] [2021-11-03 04:03:16,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:16,811 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 04:03:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:16,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032335482] [2021-11-03 04:03:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:16,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:16,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:16,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:16,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:03:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:03:17,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:17,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:03:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:17,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:17,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:17,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032335482] [2021-11-03 04:03:17,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032335482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:17,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:17,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:03:17,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743966216] [2021-11-03 04:03:17,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:03:17,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:03:17,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:03:17,762 INFO L87 Difference]: Start difference. First operand 2287 states and 2644 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-03 04:03:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:28,306 INFO L93 Difference]: Finished difference Result 3352 states and 3707 transitions. [2021-11-03 04:03:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:03:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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 27 [2021-11-03 04:03:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:28,313 INFO L225 Difference]: With dead ends: 3352 [2021-11-03 04:03:28,313 INFO L226 Difference]: Without dead ends: 3352 [2021-11-03 04:03:28,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:03:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2021-11-03 04:03:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 2320. [2021-11-03 04:03:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 1465 states have (on average 1.8300341296928329) internal successors, (2681), 2319 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 2681 transitions. [2021-11-03 04:03:28,368 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 2681 transitions. Word has length 27 [2021-11-03 04:03:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:28,368 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 2681 transitions. [2021-11-03 04:03:28,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 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) [2021-11-03 04:03:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 2681 transitions. [2021-11-03 04:03:28,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:03:28,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:28,370 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] [2021-11-03 04:03:28,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:28,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:28,582 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 04:03:28,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:28,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156748295] [2021-11-03 04:03:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:28,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:28,584 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:28,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 04:03:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:28,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:28,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:28,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:03:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:28,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:29,132 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:29,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156748295] [2021-11-03 04:03:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156748295] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:29,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:03:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60492367] [2021-11-03 04:03:29,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:29,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:29,133 INFO L87 Difference]: Start difference. First operand 2320 states and 2681 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:35,234 INFO L93 Difference]: Finished difference Result 4930 states and 5526 transitions. [2021-11-03 04:03:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:03:35,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:03:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:35,242 INFO L225 Difference]: With dead ends: 4930 [2021-11-03 04:03:35,243 INFO L226 Difference]: Without dead ends: 4930 [2021-11-03 04:03:35,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:03:35,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4930 states. [2021-11-03 04:03:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4930 to 2317. [2021-11-03 04:03:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8225255972696246) internal successors, (2670), 2316 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2670 transitions. [2021-11-03 04:03:35,281 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2670 transitions. Word has length 36 [2021-11-03 04:03:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:35,282 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2670 transitions. [2021-11-03 04:03:35,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2670 transitions. [2021-11-03 04:03:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:03:35,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:35,283 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] [2021-11-03 04:03:35,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:03:35,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:35,496 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:35,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 04:03:35,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:35,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875191671] [2021-11-03 04:03:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:35,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:35,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:35,501 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 04:03:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:03:35,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:35,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:03:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:36,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:36,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:36,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875191671] [2021-11-03 04:03:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875191671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:36,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:36,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:03:36,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747095091] [2021-11-03 04:03:36,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:03:36,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:36,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:03:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:03:36,646 INFO L87 Difference]: Start difference. First operand 2317 states and 2670 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:03:53,849 INFO L93 Difference]: Finished difference Result 4863 states and 5399 transitions. [2021-11-03 04:03:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 04:03:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 36 [2021-11-03 04:03:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:03:53,856 INFO L225 Difference]: With dead ends: 4863 [2021-11-03 04:03:53,856 INFO L226 Difference]: Without dead ends: 4863 [2021-11-03 04:03:53,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:03:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4863 states. [2021-11-03 04:03:53,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4863 to 2317. [2021-11-03 04:03:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1465 states have (on average 1.8197952218430034) internal successors, (2666), 2316 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2666 transitions. [2021-11-03 04:03:53,892 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2666 transitions. Word has length 36 [2021-11-03 04:03:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:03:53,892 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 2666 transitions. [2021-11-03 04:03:53,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:03:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2666 transitions. [2021-11-03 04:03:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:03:53,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:03:53,893 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] [2021-11-03 04:03:53,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-03 04:03:54,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:03:54,106 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:03:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:03:54,106 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 04:03:54,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:03:54,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590345611] [2021-11-03 04:03:54,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:03:54,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:03:54,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:03:54,108 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:03:54,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:03:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:03:54,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:03:54,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:03:54,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:03:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:54,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:03:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:03:54,725 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:03:54,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590345611] [2021-11-03 04:03:54,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590345611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:03:54,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:03:54,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:03:54,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499654323] [2021-11-03 04:03:54,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:03:54,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:03:54,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:03:54,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:03:54,727 INFO L87 Difference]: Start difference. First operand 2317 states and 2666 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:00,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:00,339 INFO L93 Difference]: Finished difference Result 4534 states and 5106 transitions. [2021-11-03 04:04:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:04:00,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-03 04:04:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:00,343 INFO L225 Difference]: With dead ends: 4534 [2021-11-03 04:04:00,344 INFO L226 Difference]: Without dead ends: 4534 [2021-11-03 04:04:00,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:04:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-11-03 04:04:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 2313. [2021-11-03 04:04:00,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 1465 states have (on average 1.8170648464163823) internal successors, (2662), 2312 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2662 transitions. [2021-11-03 04:04:00,370 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2662 transitions. Word has length 36 [2021-11-03 04:04:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:00,370 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 2662 transitions. [2021-11-03 04:04:00,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2662 transitions. [2021-11-03 04:04:00,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:04:00,371 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:00,371 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] [2021-11-03 04:04:00,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:00,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:00,572 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:00,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:00,572 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 04:04:00,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:00,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465899496] [2021-11-03 04:04:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:00,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:00,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:00,575 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 04:04:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:04:00,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:00,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:04:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:01,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:01,677 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:01,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465899496] [2021-11-03 04:04:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465899496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:01,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:01,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:04:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807311139] [2021-11-03 04:04:01,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:04:01,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:04:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:04:01,679 INFO L87 Difference]: Start difference. First operand 2313 states and 2662 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:16,631 INFO L93 Difference]: Finished difference Result 4430 states and 4882 transitions. [2021-11-03 04:04:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:04:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 36 [2021-11-03 04:04:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:16,636 INFO L225 Difference]: With dead ends: 4430 [2021-11-03 04:04:16,636 INFO L226 Difference]: Without dead ends: 4430 [2021-11-03 04:04:16,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:04:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-11-03 04:04:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 2309. [2021-11-03 04:04:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 1465 states have (on average 1.814334470989761) internal successors, (2658), 2308 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:16,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 2658 transitions. [2021-11-03 04:04:16,660 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 2658 transitions. Word has length 36 [2021-11-03 04:04:16,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:16,660 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 2658 transitions. [2021-11-03 04:04:16,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:16,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 2658 transitions. [2021-11-03 04:04:16,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:04:16,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:16,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:16,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:16,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:16,874 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 04:04:16,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:16,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064891414] [2021-11-03 04:04:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:16,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:16,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:16,876 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:16,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 04:04:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:17,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:17,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:17,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064891414] [2021-11-03 04:04:17,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064891414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:17,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:17,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:04:17,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338499098] [2021-11-03 04:04:17,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:04:17,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:17,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:04:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:04:17,483 INFO L87 Difference]: Start difference. First operand 2309 states and 2658 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2021-11-03 04:04:17,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:17,552 INFO L93 Difference]: Finished difference Result 2303 states and 2644 transitions. [2021-11-03 04:04:17,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:04:17,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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 40 [2021-11-03 04:04:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:17,555 INFO L225 Difference]: With dead ends: 2303 [2021-11-03 04:04:17,556 INFO L226 Difference]: Without dead ends: 2303 [2021-11-03 04:04:17,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:04:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-11-03 04:04:17,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2303. [2021-11-03 04:04:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 1459 states have (on average 1.812200137080192) internal successors, (2644), 2302 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2644 transitions. [2021-11-03 04:04:17,581 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2644 transitions. Word has length 40 [2021-11-03 04:04:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:17,581 INFO L470 AbstractCegarLoop]: Abstraction has 2303 states and 2644 transitions. [2021-11-03 04:04:17,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2021-11-03 04:04:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2644 transitions. [2021-11-03 04:04:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 04:04:17,583 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:17,583 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:17,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:17,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:17,797 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:17,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 04:04:17,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:17,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203120894] [2021-11-03 04:04:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:17,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:17,799 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:17,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:04:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:18,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:18,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:18,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203120894] [2021-11-03 04:04:18,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203120894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:18,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:18,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:04:18,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254681679] [2021-11-03 04:04:18,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:04:18,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:04:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:04:18,815 INFO L87 Difference]: Start difference. First operand 2303 states and 2644 transitions. Second operand has 3 states, 3 states have (on average 16.0) 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) [2021-11-03 04:04:19,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:19,082 INFO L93 Difference]: Finished difference Result 3720 states and 4199 transitions. [2021-11-03 04:04:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:04:19,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) 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 48 [2021-11-03 04:04:19,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:19,085 INFO L225 Difference]: With dead ends: 3720 [2021-11-03 04:04:19,086 INFO L226 Difference]: Without dead ends: 3720 [2021-11-03 04:04:19,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:04:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-11-03 04:04:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3067. [2021-11-03 04:04:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 2223 states have (on average 1.789923526765632) internal successors, (3979), 3066 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 3979 transitions. [2021-11-03 04:04:19,147 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 3979 transitions. Word has length 48 [2021-11-03 04:04:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:19,147 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 3979 transitions. [2021-11-03 04:04:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) 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) [2021-11-03 04:04:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 3979 transitions. [2021-11-03 04:04:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:04:19,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:19,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:19,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:19,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:19,361 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:19,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:19,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 04:04:19,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:19,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741019417] [2021-11-03 04:04:19,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:19,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:19,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:19,364 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:04:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:19,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:19,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:19,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:20,072 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:20,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741019417] [2021-11-03 04:04:20,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741019417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:20,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:20,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:04:20,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705674771] [2021-11-03 04:04:20,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:04:20,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:20,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:04:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:04:20,074 INFO L87 Difference]: Start difference. First operand 3067 states and 3979 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:20,138 INFO L93 Difference]: Finished difference Result 4294 states and 5284 transitions. [2021-11-03 04:04:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:04:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-11-03 04:04:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:20,142 INFO L225 Difference]: With dead ends: 4294 [2021-11-03 04:04:20,142 INFO L226 Difference]: Without dead ends: 4294 [2021-11-03 04:04:20,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:04:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-11-03 04:04:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3043. [2021-11-03 04:04:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 2199 states have (on average 1.791268758526603) internal successors, (3939), 3042 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 3939 transitions. [2021-11-03 04:04:20,177 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 3939 transitions. Word has length 51 [2021-11-03 04:04:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:20,177 INFO L470 AbstractCegarLoop]: Abstraction has 3043 states and 3939 transitions. [2021-11-03 04:04:20,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 3939 transitions. [2021-11-03 04:04:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:04:20,179 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:20,179 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:20,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:20,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:20,400 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:20,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:20,400 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 04:04:20,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:20,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334535558] [2021-11-03 04:04:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:20,401 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:20,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:20,402 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:20,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 04:04:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:21,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:21,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:21,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:21,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334535558] [2021-11-03 04:04:21,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334535558] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:21,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:21,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:04:21,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682015264] [2021-11-03 04:04:21,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:04:21,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:21,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:04:21,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:04:21,309 INFO L87 Difference]: Start difference. First operand 3043 states and 3939 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:21,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:21,388 INFO L93 Difference]: Finished difference Result 4030 states and 4773 transitions. [2021-11-03 04:04:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:04:21,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-03 04:04:21,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:21,393 INFO L225 Difference]: With dead ends: 4030 [2021-11-03 04:04:21,394 INFO L226 Difference]: Without dead ends: 4030 [2021-11-03 04:04:21,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:04:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-11-03 04:04:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3031. [2021-11-03 04:04:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 2187 states have (on average 1.791952446273434) internal successors, (3919), 3030 states have internal predecessors, (3919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 3919 transitions. [2021-11-03 04:04:21,435 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 3919 transitions. Word has length 54 [2021-11-03 04:04:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:21,435 INFO L470 AbstractCegarLoop]: Abstraction has 3031 states and 3919 transitions. [2021-11-03 04:04:21,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 3919 transitions. [2021-11-03 04:04:21,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 04:04:21,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:21,437 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:21,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:21,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:21,651 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:21,651 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 04:04:21,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:21,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381330148] [2021-11-03 04:04:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:21,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:21,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:21,653 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:21,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 04:04:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:04:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:04:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:04:22,252 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:04:22,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:04:22,315 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 04:04:22,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 04:04:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:22,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:22,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:22,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381330148] [2021-11-03 04:04:22,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381330148] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:22,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:22,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:04:22,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000164611] [2021-11-03 04:04:22,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:04:22,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:04:22,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:04:22,578 INFO L87 Difference]: Start difference. First operand 3031 states and 3919 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-11-03 04:04:24,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:24,434 INFO L93 Difference]: Finished difference Result 3136 states and 4030 transitions. [2021-11-03 04:04:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:04:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 54 [2021-11-03 04:04:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:24,439 INFO L225 Difference]: With dead ends: 3136 [2021-11-03 04:04:24,439 INFO L226 Difference]: Without dead ends: 3136 [2021-11-03 04:04:24,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:04:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-11-03 04:04:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2997. [2021-11-03 04:04:24,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2153 states have (on average 1.8039944263817929) internal successors, (3884), 2996 states have internal predecessors, (3884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 3884 transitions. [2021-11-03 04:04:24,473 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 3884 transitions. Word has length 54 [2021-11-03 04:04:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:24,474 INFO L470 AbstractCegarLoop]: Abstraction has 2997 states and 3884 transitions. [2021-11-03 04:04:24,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-11-03 04:04:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 3884 transitions. [2021-11-03 04:04:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 04:04:24,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:24,475 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:24,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 04:04:24,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:24,689 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:24,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 04:04:24,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:24,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759127054] [2021-11-03 04:04:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:24,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:24,691 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:24,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:04:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:25,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:04:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:25,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:26,035 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:26,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759127054] [2021-11-03 04:04:26,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759127054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:26,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:26,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:04:26,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425188116] [2021-11-03 04:04:26,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:04:26,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:26,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:04:26,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:04:26,038 INFO L87 Difference]: Start difference. First operand 2997 states and 3884 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:04:26,192 INFO L93 Difference]: Finished difference Result 4348 states and 5450 transitions. [2021-11-03 04:04:26,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:04:26,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-11-03 04:04:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:04:26,198 INFO L225 Difference]: With dead ends: 4348 [2021-11-03 04:04:26,198 INFO L226 Difference]: Without dead ends: 4348 [2021-11-03 04:04:26,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:04:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4348 states. [2021-11-03 04:04:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4348 to 3765. [2021-11-03 04:04:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 2921 states have (on average 1.7740499828825744) internal successors, (5182), 3764 states have internal predecessors, (5182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 5182 transitions. [2021-11-03 04:04:26,232 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 5182 transitions. Word has length 59 [2021-11-03 04:04:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:04:26,233 INFO L470 AbstractCegarLoop]: Abstraction has 3765 states and 5182 transitions. [2021-11-03 04:04:26,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:04:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 5182 transitions. [2021-11-03 04:04:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 04:04:26,234 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:04:26,234 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:04:26,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:04:26,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:04:26,448 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:04:26,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:04:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 04:04:26,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:04:26,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881658446] [2021-11-03 04:04:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:04:26,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:04:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:04:26,450 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:04:26,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 04:04:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:04:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:04:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:04:27,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:04:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:04:27,930 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 04:04:27,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-03 04:04:27,935 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 04:04:27,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-03 04:04:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:27,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:04:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:04:33,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:04:33,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881658446] [2021-11-03 04:04:33,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881658446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:04:33,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:04:33,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:04:33,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947711643] [2021-11-03 04:04:33,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:04:33,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:04:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:04:33,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 04:04:33,006 INFO L87 Difference]: Start difference. First operand 3765 states and 5182 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:05:01,025 INFO L93 Difference]: Finished difference Result 6990 states and 9595 transitions. [2021-11-03 04:05:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:05:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 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 62 [2021-11-03 04:05:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:05:01,033 INFO L225 Difference]: With dead ends: 6990 [2021-11-03 04:05:01,033 INFO L226 Difference]: Without dead ends: 6990 [2021-11-03 04:05:01,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 04:05:01,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2021-11-03 04:05:01,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 3709. [2021-11-03 04:05:01,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3709 states, 2929 states have (on average 1.7214066234209628) internal successors, (5042), 3708 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3709 states to 3709 states and 5042 transitions. [2021-11-03 04:05:01,103 INFO L78 Accepts]: Start accepts. Automaton has 3709 states and 5042 transitions. Word has length 62 [2021-11-03 04:05:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:05:01,103 INFO L470 AbstractCegarLoop]: Abstraction has 3709 states and 5042 transitions. [2021-11-03 04:05:01,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3709 states and 5042 transitions. [2021-11-03 04:05:01,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:05:01,104 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:05:01,105 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:05:01,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:05:01,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:01,320 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:05:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:05:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 04:05:01,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:05:01,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849017520] [2021-11-03 04:05:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:05:01,321 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:05:01,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:05:01,322 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:05:01,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 04:05:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:05:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:05:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:05:02,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:05:02,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-03 04:05:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-03 04:05:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:02,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:02,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:02,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849017520] [2021-11-03 04:05:02,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849017520] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:02,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:02,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:05:02,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367435933] [2021-11-03 04:05:02,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:05:02,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:05:02,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:05:02,375 INFO L87 Difference]: Start difference. First operand 3709 states and 5042 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:05:11,216 INFO L93 Difference]: Finished difference Result 6077 states and 8227 transitions. [2021-11-03 04:05:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:05:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:05:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:05:11,220 INFO L225 Difference]: With dead ends: 6077 [2021-11-03 04:05:11,221 INFO L226 Difference]: Without dead ends: 6077 [2021-11-03 04:05:11,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:05:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-11-03 04:05:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 3708. [2021-11-03 04:05:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 2929 states have (on average 1.7203823830658929) internal successors, (5039), 3707 states have internal predecessors, (5039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:11,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 5039 transitions. [2021-11-03 04:05:11,277 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 5039 transitions. Word has length 68 [2021-11-03 04:05:11,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:05:11,277 INFO L470 AbstractCegarLoop]: Abstraction has 3708 states and 5039 transitions. [2021-11-03 04:05:11,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:11,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 5039 transitions. [2021-11-03 04:05:11,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:05:11,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:05:11,279 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:05:11,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:05:11,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:11,485 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:05:11,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:05:11,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 04:05:11,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:05:11,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964872055] [2021-11-03 04:05:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:05:11,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:05:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:05:11,487 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:05:11,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:05:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:05:12,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:05:12,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:05:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:05:12,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 04:05:12,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:05:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:12,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:12,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:12,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964872055] [2021-11-03 04:05:12,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964872055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:12,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:12,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:05:12,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004845146] [2021-11-03 04:05:12,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:05:12,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:05:12,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:05:12,584 INFO L87 Difference]: Start difference. First operand 3708 states and 5039 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:05:21,477 INFO L93 Difference]: Finished difference Result 6069 states and 8213 transitions. [2021-11-03 04:05:21,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 04:05:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:05:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:05:21,481 INFO L225 Difference]: With dead ends: 6069 [2021-11-03 04:05:21,482 INFO L226 Difference]: Without dead ends: 6069 [2021-11-03 04:05:21,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:05:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2021-11-03 04:05:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 3707. [2021-11-03 04:05:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 2929 states have (on average 1.7196995561625128) internal successors, (5037), 3706 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 5037 transitions. [2021-11-03 04:05:21,523 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 5037 transitions. Word has length 68 [2021-11-03 04:05:21,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:05:21,524 INFO L470 AbstractCegarLoop]: Abstraction has 3707 states and 5037 transitions. [2021-11-03 04:05:21,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 5037 transitions. [2021-11-03 04:05:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:05:21,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:05:21,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:05:21,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-03 04:05:21,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:21,757 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:05:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:05:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 04:05:21,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:05:21,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505907935] [2021-11-03 04:05:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:05:21,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:05:21,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:05:21,759 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:05:21,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 04:05:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:05:22,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:05:22,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:05:22,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:05:22,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:05:22,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:05:22,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:05:22,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:05:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:22,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:23,266 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:23,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505907935] [2021-11-03 04:05:23,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505907935] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:23,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:23,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:05:23,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429211926] [2021-11-03 04:05:23,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:05:23,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:05:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:05:23,268 INFO L87 Difference]: Start difference. First operand 3707 states and 5037 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:05:53,261 INFO L93 Difference]: Finished difference Result 5559 states and 7494 transitions. [2021-11-03 04:05:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:05:53,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-03 04:05:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:05:53,266 INFO L225 Difference]: With dead ends: 5559 [2021-11-03 04:05:53,266 INFO L226 Difference]: Without dead ends: 5559 [2021-11-03 04:05:53,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:05:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5559 states. [2021-11-03 04:05:53,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5559 to 3706. [2021-11-03 04:05:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3706 states, 2929 states have (on average 1.7186753158074428) internal successors, (5034), 3705 states have internal predecessors, (5034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3706 states to 3706 states and 5034 transitions. [2021-11-03 04:05:53,299 INFO L78 Accepts]: Start accepts. Automaton has 3706 states and 5034 transitions. Word has length 69 [2021-11-03 04:05:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:05:53,299 INFO L470 AbstractCegarLoop]: Abstraction has 3706 states and 5034 transitions. [2021-11-03 04:05:53,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:05:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3706 states and 5034 transitions. [2021-11-03 04:05:53,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:05:53,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:05:53,301 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:05:53,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-03 04:05:53,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:05:53,533 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:05:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:05:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 04:05:53,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:05:53,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871612912] [2021-11-03 04:05:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:05:53,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:05:53,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:05:53,535 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:05:53,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 04:05:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:05:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:05:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:05:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:05:54,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 04:05:54,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 04:05:54,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 04:05:54,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 04:05:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:54,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:05:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:05:55,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:05:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871612912] [2021-11-03 04:05:55,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871612912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:05:55,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:05:55,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 04:05:55,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087280751] [2021-11-03 04:05:55,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:05:55,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:05:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:05:55,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:05:55,016 INFO L87 Difference]: Start difference. First operand 3706 states and 5034 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:06:26,642 INFO L93 Difference]: Finished difference Result 5554 states and 7485 transitions. [2021-11-03 04:06:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 04:06:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 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 69 [2021-11-03 04:06:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:06:26,647 INFO L225 Difference]: With dead ends: 5554 [2021-11-03 04:06:26,647 INFO L226 Difference]: Without dead ends: 5554 [2021-11-03 04:06:26,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:06:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-11-03 04:06:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 3705. [2021-11-03 04:06:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3705 states, 2929 states have (on average 1.7179924889040628) internal successors, (5032), 3704 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3705 states to 3705 states and 5032 transitions. [2021-11-03 04:06:26,699 INFO L78 Accepts]: Start accepts. Automaton has 3705 states and 5032 transitions. Word has length 69 [2021-11-03 04:06:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:06:26,699 INFO L470 AbstractCegarLoop]: Abstraction has 3705 states and 5032 transitions. [2021-11-03 04:06:26,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3705 states and 5032 transitions. [2021-11-03 04:06:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:06:26,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:06:26,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:06:26,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:06:26,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:06:26,901 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:06:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:06:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 04:06:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:06:26,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380569889] [2021-11-03 04:06:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:06:26,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:06:26,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:06:26,903 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:06:26,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:06:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:06:27,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:06:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:27,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:27,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:06:27,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380569889] [2021-11-03 04:06:27,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380569889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:06:27,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:06:27,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:06:27,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788660887] [2021-11-03 04:06:28,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:06:28,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:06:28,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:06:28,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:06:28,001 INFO L87 Difference]: Start difference. First operand 3705 states and 5032 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:28,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:06:28,230 INFO L93 Difference]: Finished difference Result 6082 states and 8217 transitions. [2021-11-03 04:06:28,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:06:28,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 04:06:28,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:06:28,236 INFO L225 Difference]: With dead ends: 6082 [2021-11-03 04:06:28,236 INFO L226 Difference]: Without dead ends: 6082 [2021-11-03 04:06:28,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:06:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2021-11-03 04:06:28,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 3720. [2021-11-03 04:06:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 2944 states have (on average 1.7143342391304348) internal successors, (5047), 3719 states have internal predecessors, (5047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5047 transitions. [2021-11-03 04:06:28,304 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5047 transitions. Word has length 73 [2021-11-03 04:06:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:06:28,304 INFO L470 AbstractCegarLoop]: Abstraction has 3720 states and 5047 transitions. [2021-11-03 04:06:28,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5047 transitions. [2021-11-03 04:06:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:06:28,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:06:28,306 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:06:28,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:06:28,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:06:28,522 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:06:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:06:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 04:06:28,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:06:28,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316847572] [2021-11-03 04:06:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:06:28,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:06:28,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:06:28,524 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:06:28,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 04:06:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:06:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:06:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:29,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:29,864 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:06:29,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316847572] [2021-11-03 04:06:29,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316847572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:06:29,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1981526985] [2021-11-03 04:06:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:06:29,865 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:06:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:06:29,866 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:06:29,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 04:06:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:06:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:06:31,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:31,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:31,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1981526985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:06:31,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397610462] [2021-11-03 04:06:31,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:06:31,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:06:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:06:31,378 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:06:31,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 04:06:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:06:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:06:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:32,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:06:32,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397610462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:06:32,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:06:32,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 04:06:32,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558591162] [2021-11-03 04:06:32,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:06:32,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:06:32,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:06:32,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:06:32,681 INFO L87 Difference]: Start difference. First operand 3720 states and 5047 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:06:33,382 INFO L93 Difference]: Finished difference Result 6112 states and 8247 transitions. [2021-11-03 04:06:33,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 04:06:33,388 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 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 75 [2021-11-03 04:06:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:06:33,395 INFO L225 Difference]: With dead ends: 6112 [2021-11-03 04:06:33,395 INFO L226 Difference]: Without dead ends: 6112 [2021-11-03 04:06:33,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 04:06:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6112 states. [2021-11-03 04:06:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6112 to 3750. [2021-11-03 04:06:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 2974 states have (on average 1.707128446536651) internal successors, (5077), 3749 states have internal predecessors, (5077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 5077 transitions. [2021-11-03 04:06:33,447 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 5077 transitions. Word has length 75 [2021-11-03 04:06:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:06:33,447 INFO L470 AbstractCegarLoop]: Abstraction has 3750 states and 5077 transitions. [2021-11-03 04:06:33,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:06:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 5077 transitions. [2021-11-03 04:06:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 04:06:33,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:06:33,449 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:06:33,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-03 04:06:33,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:06:33,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:06:34,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:06:34,073 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1106 more)] === [2021-11-03 04:06:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:06:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 04:06:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:06:34,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469355859] [2021-11-03 04:06:34,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:06:34,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:06:34,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:06:34,076 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:06:34,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3932bcd9-98e2-4934-8869-8e357e843cca/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 04:06:35,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 04:06:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:06:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:06:35,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:06:35,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:06:35,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:06:35,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:06:35,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:06:35,277 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 04:06:35,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 04:06:35,371 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:06:35,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-03 04:06:35,607 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 04:06:35,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 04:06:41,016 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 04:06:41,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 04:06:50,654 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 04:06:50,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 04:06:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 04:06:50,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:06:58,768 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~user~0.base_331 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~user~0.base_331)))) (forall ((|ULTIMATE.start_main_#t~mem11| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem12| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem13| (_ BitVec 32)) (ULTIMATE.start_main_~user~0.offset (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331 (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem12| |ULTIMATE.start_main_#t~mem13|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_331) ULTIMATE.start_main_~user~0.offset ((_ extract 7 0) |ULTIMATE.start_main_#t~mem11|)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv1 32)) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv2 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv3 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv4 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 7 0) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv5 32)) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv7 32)) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_main_~#i~0.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_main_~#i~0.offset|))) (_ bv10 32))))) is different from false