./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE --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 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE --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 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:01:35,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:01:35,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:01:35,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:01:35,793 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:01:35,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:01:35,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:01:35,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:01:35,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:01:35,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:01:35,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:01:35,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:01:35,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:01:35,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:01:35,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:01:35,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:01:35,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:01:35,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:01:35,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:01:35,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:01:35,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:01:35,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:01:35,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:01:35,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:01:35,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:01:35,841 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:01:35,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:01:35,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:01:35,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:01:35,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:01:35,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:01:35,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:01:35,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:01:35,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:01:35,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:01:35,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:01:35,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:01:35,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:01:35,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:01:35,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:01:35,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:01:35,876 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-24 11:01:35,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:01:35,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:01:35,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:01:35,938 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:01:35,938 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:01:35,939 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:01:35,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:01:35,939 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:01:35,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:01:35,940 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:01:35,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:01:35,940 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:01:35,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:01:35,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:01:35,941 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:01:35,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 11:01:35,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 11:01:35,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:01:35,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:01:35,947 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 11:01:35,948 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:01:35,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:01:35,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:01:35,949 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 11:01:35,949 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 11:01:35,949 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 11:01:35,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:01:35,952 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:01:35,952 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:01:35,953 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:01:35,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:01:35,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:01:35,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:01:35,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:01:35,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:01:35,955 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:01:35,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:01:35,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:01:35,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:01:35,956 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_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 [2021-10-24 11:01:36,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:01:36,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:01:36,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:01:36,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:01:36,370 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:01:36,371 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-24 11:01:36,453 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ee5c37eb3/ddcd9794c23942e688fcb7659b10a564/FLAG2de6ae5cd [2021-10-24 11:01:37,204 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:01:37,207 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-24 11:01:37,226 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ee5c37eb3/ddcd9794c23942e688fcb7659b10a564/FLAG2de6ae5cd [2021-10-24 11:01:37,244 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ee5c37eb3/ddcd9794c23942e688fcb7659b10a564 [2021-10-24 11:01:37,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:01:37,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:01:37,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:01:37,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:01:37,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:01:37,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:01:37" (1/1) ... [2021-10-24 11:01:37,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b52e116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:37, skipping insertion in model container [2021-10-24 11:01:37,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:01:37" (1/1) ... [2021-10-24 11:01:37,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:01:37,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:01:37,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:01:37,947 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) [2021-10-24 11:01:37,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@329b1d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:37, skipping insertion in model container [2021-10-24 11:01:37,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:01:37,949 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 11:01:37,953 INFO L168 Benchmark]: Toolchain (without parser) took 699.85 ms. Allocated memory is still 109.1 MB. Free memory was 76.4 MB in the beginning and 77.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:01:37,954 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 109.1 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:01:37,956 INFO L168 Benchmark]: CACSL2BoogieTranslator took 694.83 ms. Allocated memory is still 109.1 MB. Free memory was 76.4 MB in the beginning and 77.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:01:37,959 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 109.1 MB. Free memory is still 63.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 694.83 ms. Allocated memory is still 109.1 MB. Free memory was 76.4 MB in the beginning and 77.5 MB in the end (delta: -1.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:01:40,502 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:01:40,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:01:40,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:01:40,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:01:40,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:01:40,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:01:40,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:01:40,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:01:40,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:01:40,599 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:01:40,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:01:40,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:01:40,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:01:40,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:01:40,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:01:40,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:01:40,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:01:40,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:01:40,628 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:01:40,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:01:40,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:01:40,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:01:40,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:01:40,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:01:40,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:01:40,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:01:40,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:01:40,653 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:01:40,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:01:40,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:01:40,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:01:40,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:01:40,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:01:40,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:01:40,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:01:40,663 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:01:40,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:01:40,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:01:40,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:01:40,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:01:40,667 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-24 11:01:40,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:01:40,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:01:40,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:01:40,745 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:01:40,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:01:40,746 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:01:40,746 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:01:40,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:01:40,746 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:01:40,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 11:01:40,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 11:01:40,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:01:40,748 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:01:40,749 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 11:01:40,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:01:40,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:01:40,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:01:40,750 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 11:01:40,750 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 11:01:40,750 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 11:01:40,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:01:40,751 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:01:40,751 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:01:40,751 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:01:40,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:01:40,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:01:40,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:01:40,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:01:40,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:01:40,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:01:40,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:01:40,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:01:40,754 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:01:40,754 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:01:40,754 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:01:40,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:01:40,755 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_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 [2021-10-24 11:01:41,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:01:41,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:01:41,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:01:41,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:01:41,307 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:01:41,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-24 11:01:41,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ed802c7f1/0e98ba72b27f4aa892d8168887b8c343/FLAG27f39d3b4 [2021-10-24 11:01:42,190 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:01:42,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-24 11:01:42,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ed802c7f1/0e98ba72b27f4aa892d8168887b8c343/FLAG27f39d3b4 [2021-10-24 11:01:42,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/data/ed802c7f1/0e98ba72b27f4aa892d8168887b8c343 [2021-10-24 11:01:42,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:01:42,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:01:42,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:01:42,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:01:42,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:01:42,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:01:42" (1/1) ... [2021-10-24 11:01:42,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704228d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:42, skipping insertion in model container [2021-10-24 11:01:42,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:01:42" (1/1) ... [2021-10-24 11:01:42,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:01:42,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:01:42,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:01:42,999 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 11:01:43,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:01:43,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:01:43,083 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:01:43,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:01:43,225 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:01:43,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43 WrapperNode [2021-10-24 11:01:43,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:01:43,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:01:43,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:01:43,229 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:01:43,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:01:43,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:01:43,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:01:43,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:01:43,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:01:43,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:01:43,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:01:43,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:01:43,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (1/1) ... [2021-10-24 11:01:43,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:01:43,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:01:43,477 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:01:43,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:01:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 11:01:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 11:01:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:01:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 11:01:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 11:01:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-24 11:01:43,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:01:43,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:01:44,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:01:44,154 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-24 11:01:44,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:01:44 BoogieIcfgContainer [2021-10-24 11:01:44,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:01:44,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:01:44,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:01:44,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:01:44,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:01:42" (1/3) ... [2021-10-24 11:01:44,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7048b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:01:44, skipping insertion in model container [2021-10-24 11:01:44,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:01:43" (2/3) ... [2021-10-24 11:01:44,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7048b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:01:44, skipping insertion in model container [2021-10-24 11:01:44,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:01:44" (3/3) ... [2021-10-24 11:01:44,166 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11_2.i [2021-10-24 11:01:44,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:01:44,172 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-10-24 11:01:44,230 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:01:44,240 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 [2021-10-24 11:01:44,240 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-10-24 11:01:44,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:01:44,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:01:44,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:01:44,285 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:01:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:01:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 889508829, now seen corresponding path program 1 times [2021-10-24 11:01:44,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:01:44,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841599288] [2021-10-24 11:01:44,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:01:44,318 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:01:44,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:01:44,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:01:44,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:01:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:01:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:01:44,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:01:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:44,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:01:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:44,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:01:44,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841599288] [2021-10-24 11:01:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841599288] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:01:44,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:01:44,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:01:44,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475965238] [2021-10-24 11:01:44,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:01:44,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:01:44,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:01:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:01:44,640 INFO L87 Difference]: Start difference. First operand has 79 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:01:44,912 INFO L93 Difference]: Finished difference Result 295 states and 317 transitions. [2021-10-24 11:01:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:01:44,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 11:01:44,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:01:44,930 INFO L225 Difference]: With dead ends: 295 [2021-10-24 11:01:44,931 INFO L226 Difference]: Without dead ends: 287 [2021-10-24 11:01:44,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:01:44,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-24 11:01:45,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 79. [2021-10-24 11:01:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.74) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-10-24 11:01:45,019 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 6 [2021-10-24 11:01:45,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:01:45,020 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-10-24 11:01:45,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-10-24 11:01:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:01:45,021 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:01:45,022 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:01:45,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-24 11:01:45,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:01:45,235 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:01:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:01:45,236 INFO L82 PathProgramCache]: Analyzing trace with hash 889568411, now seen corresponding path program 1 times [2021-10-24 11:01:45,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:01:45,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903299971] [2021-10-24 11:01:45,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:01:45,238 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:01:45,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:01:45,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:01:45,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:01:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:01:45,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 11:01:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:01:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:45,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:01:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:45,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:01:45,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903299971] [2021-10-24 11:01:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903299971] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:01:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:01:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 11:01:45,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381423267] [2021-10-24 11:01:45,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 11:01:45,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:01:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 11:01:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:01:45,362 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:01:45,605 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2021-10-24 11:01:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 11:01:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 11:01:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:01:45,609 INFO L225 Difference]: With dead ends: 150 [2021-10-24 11:01:45,609 INFO L226 Difference]: Without dead ends: 149 [2021-10-24 11:01:45,610 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 11:01:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-24 11:01:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 77. [2021-10-24 11:01:45,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.75) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-10-24 11:01:45,637 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 6 [2021-10-24 11:01:45,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:01:45,638 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-10-24 11:01:45,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:45,638 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-10-24 11:01:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:01:45,639 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:01:45,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:01:45,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 11:01:45,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:01:45,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:01:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:01:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -592189876, now seen corresponding path program 1 times [2021-10-24 11:01:45,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:01:45,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183273197] [2021-10-24 11:01:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:01:45,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:01:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:01:45,857 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:01:45,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:01:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:01:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:01:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:01:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:46,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:01:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:46,085 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:01:46,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183273197] [2021-10-24 11:01:46,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183273197] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:01:46,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:01:46,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:01:46,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648723588] [2021-10-24 11:01:46,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:01:46,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:01:46,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:01:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:01:46,096 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:01:46,287 INFO L93 Difference]: Finished difference Result 274 states and 291 transitions. [2021-10-24 11:01:46,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:01:46,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 11:01:46,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:01:46,295 INFO L225 Difference]: With dead ends: 274 [2021-10-24 11:01:46,295 INFO L226 Difference]: Without dead ends: 274 [2021-10-24 11:01:46,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:01:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-24 11:01:46,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 79. [2021-10-24 11:01:46,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.72) internal successors, (86), 78 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-10-24 11:01:46,314 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 9 [2021-10-24 11:01:46,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:01:46,315 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-10-24 11:01:46,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-10-24 11:01:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:01:46,316 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:01:46,316 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:01:46,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:01:46,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:01:46,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:01:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:01:46,528 INFO L82 PathProgramCache]: Analyzing trace with hash -592189907, now seen corresponding path program 1 times [2021-10-24 11:01:46,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:01:46,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738910452] [2021-10-24 11:01:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:01:46,530 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:01:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:01:46,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:01:46,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 11:01:46,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:01:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:01:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:01:46,664 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 [2021-10-24 11:01:46,727 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 11:01:46,727 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 17 treesize of output 22 [2021-10-24 11:01:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:46,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:01:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:46,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:01:46,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738910452] [2021-10-24 11:01:46,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738910452] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:01:46,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:01:46,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 11:01:46,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066857512] [2021-10-24 11:01:46,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:01:46,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:01:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:01:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:01:46,912 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:01:47,249 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-10-24 11:01:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:01:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 11:01:47,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:01:47,252 INFO L225 Difference]: With dead ends: 166 [2021-10-24 11:01:47,253 INFO L226 Difference]: Without dead ends: 166 [2021-10-24 11:01:47,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:01:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-24 11:01:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 90. [2021-10-24 11:01:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 89 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-10-24 11:01:47,263 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 9 [2021-10-24 11:01:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:01:47,263 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-10-24 11:01:47,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:01:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-10-24 11:01:47,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:01:47,264 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:01:47,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:01:47,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 11:01:47,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:01:47,478 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:01:47,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:01:47,479 INFO L82 PathProgramCache]: Analyzing trace with hash -592189906, now seen corresponding path program 1 times [2021-10-24 11:01:47,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:01:47,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890545496] [2021-10-24 11:01:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:01:47,480 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:01:47,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:01:47,482 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:01:47,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 11:01:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:01:47,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:01:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:01:47,601 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 [2021-10-24 11:01:47,609 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 [2021-10-24 11:01:47,763 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 11:01:47,764 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 28 treesize of output 30 [2021-10-24 11:01:47,788 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:01:47,789 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 22 treesize of output 22 [2021-10-24 11:01:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:47,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:01:50,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-10-24 11:01:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:01:50,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:01:50,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890545496] [2021-10-24 11:01:50,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890545496] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:01:50,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:01:50,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:01:50,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135103953] [2021-10-24 11:01:50,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:01:50,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:01:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:01:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-24 11:01:50,592 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:05,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:05,777 INFO L93 Difference]: Finished difference Result 298 states and 317 transitions. [2021-10-24 11:02:05,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:02:05,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 11:02:05,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:05,780 INFO L225 Difference]: With dead ends: 298 [2021-10-24 11:02:05,781 INFO L226 Difference]: Without dead ends: 298 [2021-10-24 11:02:05,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 3259.8ms TimeCoverageRelationStatistics Valid=101, Invalid=240, Unknown=1, NotChecked=0, Total=342 [2021-10-24 11:02:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-10-24 11:02:05,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 90. [2021-10-24 11:02:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.639344262295082) internal successors, (100), 89 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-10-24 11:02:05,789 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 9 [2021-10-24 11:02:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:05,790 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-10-24 11:02:05,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-10-24 11:02:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:02:05,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:05,791 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:05,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:05,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:05,992 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:05,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:05,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1182817455, now seen corresponding path program 1 times [2021-10-24 11:02:05,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:05,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099577074] [2021-10-24 11:02:05,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:05,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:05,995 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:05,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 11:02:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:06,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:02:06,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:06,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:06,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:06,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099577074] [2021-10-24 11:02:06,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099577074] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:06,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:06,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:02:06,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946373220] [2021-10-24 11:02:06,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:02:06,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:06,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:02:06,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:02:06,182 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:06,272 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-10-24 11:02:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:02:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 11:02:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:06,274 INFO L225 Difference]: With dead ends: 147 [2021-10-24 11:02:06,275 INFO L226 Difference]: Without dead ends: 145 [2021-10-24 11:02:06,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:02:06,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-24 11:02:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 80. [2021-10-24 11:02:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-10-24 11:02:06,280 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 9 [2021-10-24 11:02:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:06,280 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-10-24 11:02:06,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-10-24 11:02:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 11:02:06,281 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:06,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:06,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:06,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:06,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1176169776, now seen corresponding path program 1 times [2021-10-24 11:02:06,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:06,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300771498] [2021-10-24 11:02:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:06,501 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:06,502 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 11:02:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:06,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:02:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:06,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:06,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:06,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300771498] [2021-10-24 11:02:06,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300771498] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:06,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:06,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-24 11:02:06,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282669076] [2021-10-24 11:02:06,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:02:06,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:06,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:02:06,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:02:06,852 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:07,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:07,060 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2021-10-24 11:02:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:02:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-24 11:02:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:07,062 INFO L225 Difference]: With dead ends: 143 [2021-10-24 11:02:07,062 INFO L226 Difference]: Without dead ends: 143 [2021-10-24 11:02:07,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:02:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-24 11:02:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 79. [2021-10-24 11:02:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-10-24 11:02:07,068 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 10 [2021-10-24 11:02:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:07,068 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-10-24 11:02:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-10-24 11:02:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 11:02:07,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:07,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:07,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-24 11:02:07,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:07,290 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:07,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash -722750891, now seen corresponding path program 1 times [2021-10-24 11:02:07,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:07,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610986627] [2021-10-24 11:02:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:07,292 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:07,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:07,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 11:02:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:07,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:02:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:07,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:11,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:11,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610986627] [2021-10-24 11:02:11,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610986627] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:11,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:11,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-24 11:02:11,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034367174] [2021-10-24 11:02:11,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:02:11,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:11,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:02:11,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=50, Unknown=2, NotChecked=0, Total=72 [2021-10-24 11:02:11,868 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:12,500 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2021-10-24 11:02:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:02:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 11:02:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:12,502 INFO L225 Difference]: With dead ends: 139 [2021-10-24 11:02:12,502 INFO L226 Difference]: Without dead ends: 135 [2021-10-24 11:02:12,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 4349.1ms TimeCoverageRelationStatistics Valid=32, Invalid=76, Unknown=2, NotChecked=0, Total=110 [2021-10-24 11:02:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-24 11:02:12,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 74. [2021-10-24 11:02:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 73 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2021-10-24 11:02:12,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 12 [2021-10-24 11:02:12,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:12,508 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2021-10-24 11:02:12,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2021-10-24 11:02:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:02:12,509 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:12,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:12,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:12,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:12,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:12,721 INFO L82 PathProgramCache]: Analyzing trace with hash -493394208, now seen corresponding path program 1 times [2021-10-24 11:02:12,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:12,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220833420] [2021-10-24 11:02:12,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:12,721 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:12,722 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:12,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 11:02:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:12,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:02:12,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:12,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:12,922 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:12,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220833420] [2021-10-24 11:02:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220833420] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:12,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:12,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:02:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711856451] [2021-10-24 11:02:12,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:02:12,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:02:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:02:12,924 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:13,006 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2021-10-24 11:02:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:02:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 11:02:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:13,008 INFO L225 Difference]: With dead ends: 235 [2021-10-24 11:02:13,008 INFO L226 Difference]: Without dead ends: 235 [2021-10-24 11:02:13,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:02:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-24 11:02:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 76. [2021-10-24 11:02:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.62) internal successors, (81), 75 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) [2021-10-24 11:02:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-10-24 11:02:13,013 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 14 [2021-10-24 11:02:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:13,013 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-10-24 11:02:13,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-10-24 11:02:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:02:13,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:13,015 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:13,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:13,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:13,226 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -493394216, now seen corresponding path program 1 times [2021-10-24 11:02:13,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:13,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131035021] [2021-10-24 11:02:13,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:13,227 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:13,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:13,228 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:13,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 11:02:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:13,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 11:02:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:13,354 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 [2021-10-24 11:02:13,407 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-24 11:02:13,408 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 20 treesize of output 25 [2021-10-24 11:02:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:13,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:13,519 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:13,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131035021] [2021-10-24 11:02:13,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131035021] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:13,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:13,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 11:02:13,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923277090] [2021-10-24 11:02:13,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:02:13,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:02:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:02:13,521 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:13,787 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-10-24 11:02:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:02:13,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 11:02:13,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:13,789 INFO L225 Difference]: With dead ends: 147 [2021-10-24 11:02:13,789 INFO L226 Difference]: Without dead ends: 147 [2021-10-24 11:02:13,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:02:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-24 11:02:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 89. [2021-10-24 11:02:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.5714285714285714) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-10-24 11:02:13,794 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 14 [2021-10-24 11:02:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:13,801 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-10-24 11:02:13,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-10-24 11:02:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:02:13,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:13,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:13,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:14,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:14,003 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:14,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:14,004 INFO L82 PathProgramCache]: Analyzing trace with hash -493394215, now seen corresponding path program 1 times [2021-10-24 11:02:14,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:14,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91596764] [2021-10-24 11:02:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:14,004 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:14,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:14,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-24 11:02:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:14,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:02:14,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:14,169 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 [2021-10-24 11:02:14,178 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 [2021-10-24 11:02:14,336 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 11:02:14,337 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 28 treesize of output 30 [2021-10-24 11:02:14,352 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:02:14,352 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 22 treesize of output 22 [2021-10-24 11:02:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:14,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:16,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-10-24 11:02:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:17,006 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:17,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91596764] [2021-10-24 11:02:17,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91596764] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:17,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:17,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 11:02:17,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45636349] [2021-10-24 11:02:17,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:02:17,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:17,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:02:17,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-24 11:02:17,008 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:29,687 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2021-10-24 11:02:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-24 11:02:29,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 11:02:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:29,689 INFO L225 Difference]: With dead ends: 271 [2021-10-24 11:02:29,689 INFO L226 Difference]: Without dead ends: 271 [2021-10-24 11:02:29,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 7371.5ms TimeCoverageRelationStatistics Valid=149, Invalid=356, Unknown=1, NotChecked=0, Total=506 [2021-10-24 11:02:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-10-24 11:02:29,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 117. [2021-10-24 11:02:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 91 states have (on average 1.6043956043956045) internal successors, (146), 116 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:29,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2021-10-24 11:02:29,696 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 14 [2021-10-24 11:02:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:29,696 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2021-10-24 11:02:29,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2021-10-24 11:02:29,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 11:02:29,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:29,698 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:29,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:29,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:29,903 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 186664154, now seen corresponding path program 1 times [2021-10-24 11:02:29,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:29,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104386676] [2021-10-24 11:02:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:29,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:29,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:29,904 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:29,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 11:02:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:02:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:30,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:30,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:30,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:30,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104386676] [2021-10-24 11:02:30,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104386676] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:30,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:30,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:02:30,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211901337] [2021-10-24 11:02:30,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:02:30,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:02:30,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:02:30,137 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:30,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:30,214 INFO L93 Difference]: Finished difference Result 135 states and 141 transitions. [2021-10-24 11:02:30,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:02:30,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 11:02:30,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:30,216 INFO L225 Difference]: With dead ends: 135 [2021-10-24 11:02:30,216 INFO L226 Difference]: Without dead ends: 133 [2021-10-24 11:02:30,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:02:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-24 11:02:30,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2021-10-24 11:02:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 53 states have (on average 1.528301886792453) internal successors, (81), 75 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) [2021-10-24 11:02:30,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2021-10-24 11:02:30,218 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 14 [2021-10-24 11:02:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:30,218 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2021-10-24 11:02:30,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2021-10-24 11:02:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 11:02:30,219 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:30,219 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:30,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-24 11:02:30,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:30,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1886495925, now seen corresponding path program 1 times [2021-10-24 11:02:30,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:30,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451267365] [2021-10-24 11:02:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:30,430 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:30,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:30,431 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:30,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-24 11:02:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:30,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:02:30,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:30,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:31,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:31,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451267365] [2021-10-24 11:02:31,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451267365] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:31,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:31,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-24 11:02:31,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752160505] [2021-10-24 11:02:31,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:02:31,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:31,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:02:31,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:02:31,021 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:31,202 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-10-24 11:02:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:02:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 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 15 [2021-10-24 11:02:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:31,204 INFO L225 Difference]: With dead ends: 75 [2021-10-24 11:02:31,204 INFO L226 Difference]: Without dead ends: 75 [2021-10-24 11:02:31,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:02:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-24 11:02:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-24 11:02:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.490566037735849) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-10-24 11:02:31,207 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 15 [2021-10-24 11:02:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:31,207 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-10-24 11:02:31,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-10-24 11:02:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 11:02:31,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:31,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:31,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:31,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:31,415 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1705438503, now seen corresponding path program 1 times [2021-10-24 11:02:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:31,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431674072] [2021-10-24 11:02:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:31,417 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:31,418 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:31,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-24 11:02:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:31,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 11:02:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:31,614 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 [2021-10-24 11:02:31,710 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-24 11:02:31,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-24 11:02:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:31,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:35,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:35,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431674072] [2021-10-24 11:02:35,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431674072] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:35,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:35,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-24 11:02:35,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607484801] [2021-10-24 11:02:35,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 11:02:35,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 11:02:35,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=42, Unknown=2, NotChecked=0, Total=72 [2021-10-24 11:02:35,987 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 9 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) [2021-10-24 11:02:36,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:36,597 INFO L93 Difference]: Finished difference Result 170 states and 179 transitions. [2021-10-24 11:02:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 11:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 9 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 16 [2021-10-24 11:02:36,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:36,599 INFO L225 Difference]: With dead ends: 170 [2021-10-24 11:02:36,599 INFO L226 Difference]: Without dead ends: 170 [2021-10-24 11:02:36,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4219.2ms TimeCoverageRelationStatistics Valid=54, Invalid=76, Unknown=2, NotChecked=0, Total=132 [2021-10-24 11:02:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-24 11:02:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 74. [2021-10-24 11:02:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.471698113207547) internal successors, (78), 73 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) [2021-10-24 11:02:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-10-24 11:02:36,603 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 16 [2021-10-24 11:02:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:36,604 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-10-24 11:02:36,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 9 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) [2021-10-24 11:02:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-10-24 11:02:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 11:02:36,605 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:36,605 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:36,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:36,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:36,814 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:36,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1705438502, now seen corresponding path program 1 times [2021-10-24 11:02:36,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:36,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475164179] [2021-10-24 11:02:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:36,816 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:36,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:36,817 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:36,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 11:02:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:37,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 11:02:37,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:37,027 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 [2021-10-24 11:02:37,033 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 [2021-10-24 11:02:37,148 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:02:37,148 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 [2021-10-24 11:02:37,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-24 11:02:37,310 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-24 11:02:37,310 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 12 treesize of output 18 [2021-10-24 11:02:37,333 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:02:37,333 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 19 treesize of output 19 [2021-10-24 11:02:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:39,949 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-24 11:02:39,950 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 32 treesize of output 31 [2021-10-24 11:02:42,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-10-24 11:02:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:42,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:42,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475164179] [2021-10-24 11:02:42,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475164179] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:42,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:42,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-24 11:02:42,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995458441] [2021-10-24 11:02:42,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 11:02:42,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 11:02:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-10-24 11:02:42,678 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:46,043 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2021-10-24 11:02:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-24 11:02:46,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 11:02:46,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:46,045 INFO L225 Difference]: With dead ends: 143 [2021-10-24 11:02:46,045 INFO L226 Difference]: Without dead ends: 143 [2021-10-24 11:02:46,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5781.3ms TimeCoverageRelationStatistics Valid=135, Invalid=370, Unknown=1, NotChecked=0, Total=506 [2021-10-24 11:02:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-24 11:02:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 72. [2021-10-24 11:02:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:46,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-10-24 11:02:46,049 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 16 [2021-10-24 11:02:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:46,050 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-10-24 11:02:46,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-10-24 11:02:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 11:02:46,051 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:46,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:46,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:46,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:46,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:46,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1751106330, now seen corresponding path program 1 times [2021-10-24 11:02:46,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:46,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684020746] [2021-10-24 11:02:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:46,264 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:46,265 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:46,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-24 11:02:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:46,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-24 11:02:46,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:46,570 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 11 treesize of output 7 [2021-10-24 11:02:46,623 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 [2021-10-24 11:02:46,789 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-24 11:02:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2021-10-24 11:02:46,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:02:46,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2021-10-24 11:02:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:47,407 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-10-24 11:02:47,407 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 81 treesize of output 80 [2021-10-24 11:02:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:47,538 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:47,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684020746] [2021-10-24 11:02:47,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684020746] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:47,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:47,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 8] imperfect sequences [] total 18 [2021-10-24 11:02:47,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986388979] [2021-10-24 11:02:47,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-24 11:02:47,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-24 11:02:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:02:47,540 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:52,476 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2021-10-24 11:02:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-24 11:02:52,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 11:02:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:52,478 INFO L225 Difference]: With dead ends: 119 [2021-10-24 11:02:52,478 INFO L226 Difference]: Without dead ends: 119 [2021-10-24 11:02:52,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 3339.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-10-24 11:02:52,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-24 11:02:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2021-10-24 11:02:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:52,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-10-24 11:02:52,482 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 18 [2021-10-24 11:02:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:52,483 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-10-24 11:02:52,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-10-24 11:02:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 11:02:52,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:52,484 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:52,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-24 11:02:52,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:52,696 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:52,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1751106331, now seen corresponding path program 1 times [2021-10-24 11:02:52,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:52,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382491240] [2021-10-24 11:02:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:52,697 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:52,698 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:52,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-24 11:02:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:52,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-24 11:02:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:52,950 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 [2021-10-24 11:02:52,994 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:02:52,994 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 19 treesize of output 19 [2021-10-24 11:02:53,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:02:53,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:02:53,249 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:02:53,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 59 [2021-10-24 11:02:53,267 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:02:53,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-10-24 11:02:53,377 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 45 treesize of output 33 [2021-10-24 11:02:53,380 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 30 treesize of output 18 [2021-10-24 11:02:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:53,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:53,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:02:53,844 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 70 treesize of output 74 [2021-10-24 11:02:55,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:02:55,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:02:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:55,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:55,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382491240] [2021-10-24 11:02:55,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382491240] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:55,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:55,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-10-24 11:02:55,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734331707] [2021-10-24 11:02:55,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-24 11:02:55,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:55,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-24 11:02:55,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-10-24 11:02:55,568 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:02:59,408 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2021-10-24 11:02:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-24 11:02:59,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 11:02:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:02:59,410 INFO L225 Difference]: With dead ends: 139 [2021-10-24 11:02:59,410 INFO L226 Difference]: Without dead ends: 139 [2021-10-24 11:02:59,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3223.9ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-10-24 11:02:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-24 11:02:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 79. [2021-10-24 11:02:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.360655737704918) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-24 11:02:59,414 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 18 [2021-10-24 11:02:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:02:59,416 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-24 11:02:59,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:02:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-24 11:02:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-24 11:02:59,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:02:59,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:02:59,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-24 11:02:59,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:02:59,630 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:02:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:02:59,631 INFO L82 PathProgramCache]: Analyzing trace with hash 941759704, now seen corresponding path program 1 times [2021-10-24 11:02:59,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:02:59,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721147150] [2021-10-24 11:02:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:02:59,632 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:02:59,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:02:59,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:02:59,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-24 11:02:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:02:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 11:02:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:02:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:59,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:02:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:02:59,954 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:02:59,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721147150] [2021-10-24 11:02:59,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721147150] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:02:59,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:02:59,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:02:59,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972829654] [2021-10-24 11:02:59,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:02:59,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:02:59,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:02:59,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:02:59,958 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:03:00,019 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-10-24 11:03:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:03:00,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-24 11:03:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:03:00,020 INFO L225 Difference]: With dead ends: 120 [2021-10-24 11:03:00,020 INFO L226 Difference]: Without dead ends: 120 [2021-10-24 11:03:00,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:03:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-24 11:03:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-10-24 11:03:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-10-24 11:03:00,023 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 18 [2021-10-24 11:03:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:03:00,023 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-10-24 11:03:00,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-10-24 11:03:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-24 11:03:00,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:03:00,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:03:00,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-24 11:03:00,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:03:00,237 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:03:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:03:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1179459719, now seen corresponding path program 1 times [2021-10-24 11:03:00,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:03:00,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581972348] [2021-10-24 11:03:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:03:00,238 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:03:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:03:00,239 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:03:00,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-24 11:03:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:03:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 11:03:00,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:03:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:03:02,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:03:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:03:11,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:03:11,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1581972348] [2021-10-24 11:03:11,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1581972348] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:03:11,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:03:11,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-24 11:03:11,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126493772] [2021-10-24 11:03:12,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 11:03:12,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:03:12,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 11:03:12,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=166, Unknown=5, NotChecked=0, Total=210 [2021-10-24 11:03:12,001 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:03:23,259 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-24 11:03:23,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-24 11:03:23,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-24 11:03:23,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:03:23,261 INFO L225 Difference]: With dead ends: 74 [2021-10-24 11:03:23,261 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 11:03:23,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 13240.4ms TimeCoverageRelationStatistics Valid=76, Invalid=298, Unknown=6, NotChecked=0, Total=380 [2021-10-24 11:03:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 11:03:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-24 11:03:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-24 11:03:23,263 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 20 [2021-10-24 11:03:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:03:23,263 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-24 11:03:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:03:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-24 11:03:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 11:03:23,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:03:23,265 INFO L512 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] [2021-10-24 11:03:23,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-24 11:03:23,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:03:23,482 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:03:23,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:03:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -373354461, now seen corresponding path program 1 times [2021-10-24 11:03:23,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:03:23,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079736592] [2021-10-24 11:03:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:03:23,484 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:03:23,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:03:23,485 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:03:23,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 11:03:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:03:23,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-24 11:03:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:03:23,815 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 [2021-10-24 11:03:23,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:03:23,860 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 [2021-10-24 11:03:23,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:03:23,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:03:23,993 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 [2021-10-24 11:03:24,165 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:03:24,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2021-10-24 11:03:24,190 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:03:24,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 47 [2021-10-24 11:03:24,286 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 46 treesize of output 38 [2021-10-24 11:03:24,458 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-24 11:03:24,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2021-10-24 11:03:24,602 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-24 11:03:24,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 40 [2021-10-24 11:03:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:03:24,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:04:27,976 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-10-24 11:04:27,976 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 238 treesize of output 198 [2021-10-24 11:04:29,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_entry_point_~fe~1.offset (_ BitVec 32)) (|v_ULTIMATE.start_ldv_malloc_#res.base_77| (_ BitVec 32))) (= |v_ULTIMATE.start_ldv_malloc_#res.base_77| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_77|)))) (select .cse0 (select (select .cse0 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset ULTIMATE.start_entry_point_~fe~1.offset)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)))) is different from false [2021-10-24 11:04:30,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:04:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 849 treesize of output 729 [2021-10-24 11:04:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:30,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:04:30,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079736592] [2021-10-24 11:04:30,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079736592] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:04:30,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:04:30,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 24 [2021-10-24 11:04:30,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701731695] [2021-10-24 11:04:30,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-24 11:04:30,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:04:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-24 11:04:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=469, Unknown=24, NotChecked=44, Total=600 [2021-10-24 11:04:30,301 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:04:51,943 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-10-24 11:04:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 11:04:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2021-10-24 11:04:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:04:51,945 INFO L225 Difference]: With dead ends: 120 [2021-10-24 11:04:51,945 INFO L226 Difference]: Without dead ends: 120 [2021-10-24 11:04:51,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 76774.9ms TimeCoverageRelationStatistics Valid=341, Invalid=1278, Unknown=25, NotChecked=78, Total=1722 [2021-10-24 11:04:51,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-24 11:04:51,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 64. [2021-10-24 11:04:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.375) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-10-24 11:04:51,948 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 23 [2021-10-24 11:04:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:04:51,949 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-10-24 11:04:51,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:04:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-10-24 11:04:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-24 11:04:51,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:04:51,950 INFO L512 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] [2021-10-24 11:04:51,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 11:04:52,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:04:52,159 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:04:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:04:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -373354460, now seen corresponding path program 1 times [2021-10-24 11:04:52,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:04:52,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812192744] [2021-10-24 11:04:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:04:52,160 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:04:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:04:52,162 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:04:52,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-24 11:04:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:04:52,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-24 11:04:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:04:52,530 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 [2021-10-24 11:04:52,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:04:52,585 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 17 treesize of output 17 [2021-10-24 11:04:52,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:04:52,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 11:04:52,784 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 [2021-10-24 11:04:52,808 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 [2021-10-24 11:04:53,029 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:04:53,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 55 [2021-10-24 11:04:53,052 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-24 11:04:53,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 60 [2021-10-24 11:04:53,493 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-24 11:04:53,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 49 [2021-10-24 11:04:53,502 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-24 11:04:53,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2021-10-24 11:04:53,707 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-24 11:04:53,707 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 30 treesize of output 32 [2021-10-24 11:04:53,723 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:04:53,723 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 24 treesize of output 24 [2021-10-24 11:04:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:04:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:07,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 538 treesize of output 500 [2021-10-24 11:05:07,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 498 [2021-10-24 11:05:09,266 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_84| (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_84|)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)) (select (select .cse0 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)))) c_ULTIMATE.start_ldv_malloc_~size)) (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_84| (_ BitVec 32))) (= |v_ULTIMATE.start_ldv_malloc_#res.base_84| (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_84|)))) (select .cse1 (select (select .cse1 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))) (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)))) (forall ((|v_ULTIMATE.start_ldv_malloc_#res.base_84| (_ BitVec 32))) (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset (_ bv0 32))))) (select (select .cse3 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_entry_point_~cfg~1.base) c_ULTIMATE.start_entry_point_~cfg~1.offset |v_ULTIMATE.start_ldv_malloc_#res.base_84|)) c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset)) (select (select .cse3 c_ULTIMATE.start_entry_point_~c11~0.base) c_ULTIMATE.start_entry_point_~c11~0.offset))))) (bvule .cse2 (bvadd (_ bv4 32) .cse2))))) is different from false [2021-10-24 11:05:23,538 WARN L207 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 31 [2021-10-24 11:05:23,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:05:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 420 treesize of output 364 [2021-10-24 11:05:23,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:05:23,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:05:23,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:05:23,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-24 11:05:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:23,732 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:23,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812192744] [2021-10-24 11:05:23,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812192744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:23,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:23,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [] total 27 [2021-10-24 11:05:23,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736948036] [2021-10-24 11:05:23,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-24 11:05:23,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:23,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-24 11:05:23,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=624, Unknown=6, NotChecked=50, Total=756 [2021-10-24 11:05:23,735 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:33,159 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-10-24 11:05:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-24 11:05:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 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 23 [2021-10-24 11:05:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:33,161 INFO L225 Difference]: With dead ends: 118 [2021-10-24 11:05:33,161 INFO L226 Difference]: Without dead ends: 118 [2021-10-24 11:05:33,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 35047.8ms TimeCoverageRelationStatistics Valid=367, Invalid=1611, Unknown=6, NotChecked=86, Total=2070 [2021-10-24 11:05:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-24 11:05:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 63. [2021-10-24 11:05:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-24 11:05:33,164 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 23 [2021-10-24 11:05:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:33,166 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-24 11:05:33,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-24 11:05:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 11:05:33,167 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:33,168 INFO L512 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] [2021-10-24 11:05:33,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:33,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:33,370 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:33,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:33,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1310912065, now seen corresponding path program 1 times [2021-10-24 11:05:33,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:33,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264563871] [2021-10-24 11:05:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:33,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:33,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:33,374 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-24 11:05:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:33,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:05:33,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:33,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:33,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:33,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264563871] [2021-10-24 11:05:33,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264563871] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:33,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:33,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:05:33,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926573195] [2021-10-24 11:05:33,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:05:33,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:05:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:33,803 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:33,853 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-10-24 11:05:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:05:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-24 11:05:33,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:33,855 INFO L225 Difference]: With dead ends: 101 [2021-10-24 11:05:33,855 INFO L226 Difference]: Without dead ends: 101 [2021-10-24 11:05:33,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-24 11:05:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-10-24 11:05:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.34) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-24 11:05:33,857 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 24 [2021-10-24 11:05:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:33,858 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-24 11:05:33,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-24 11:05:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 11:05:33,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:33,859 INFO L512 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] [2021-10-24 11:05:33,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:34,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:34,066 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1312759107, now seen corresponding path program 1 times [2021-10-24 11:05:34,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:34,067 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105887385] [2021-10-24 11:05:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:34,067 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:34,068 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:34,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 11:05:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:05:34,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:34,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:34,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105887385] [2021-10-24 11:05:34,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105887385] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:34,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:34,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 11:05:34,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039831537] [2021-10-24 11:05:34,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:05:34,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:05:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:34,555 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:34,720 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-10-24 11:05:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 11:05:34,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-24 11:05:34,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:34,722 INFO L225 Difference]: With dead ends: 69 [2021-10-24 11:05:34,722 INFO L226 Difference]: Without dead ends: 69 [2021-10-24 11:05:34,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:34,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-24 11:05:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-10-24 11:05:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.3) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-24 11:05:34,724 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 24 [2021-10-24 11:05:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:34,724 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-24 11:05:34,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:34,725 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-24 11:05:34,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-24 11:05:34,725 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:34,725 INFO L512 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] [2021-10-24 11:05:34,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:34,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:34,934 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:34,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1312759108, now seen corresponding path program 1 times [2021-10-24 11:05:34,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:34,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264433440] [2021-10-24 11:05:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:34,935 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:34,936 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-24 11:05:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:35,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-24 11:05:35,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:35,302 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 [2021-10-24 11:05:35,311 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 [2021-10-24 11:05:35,401 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:05:35,401 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 [2021-10-24 11:05:35,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-24 11:05:35,538 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-24 11:05:35,538 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 12 treesize of output 18 [2021-10-24 11:05:35,564 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:05:35,564 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 20 treesize of output 20 [2021-10-24 11:05:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:38,412 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-24 11:05:38,412 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 36 treesize of output 35 [2021-10-24 11:05:39,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-10-24 11:05:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:39,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:39,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264433440] [2021-10-24 11:05:39,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264433440] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:39,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:39,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-10-24 11:05:39,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872918256] [2021-10-24 11:05:39,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-24 11:05:39,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-24 11:05:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2021-10-24 11:05:39,213 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:43,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:43,050 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-10-24 11:05:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 11:05:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 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 24 [2021-10-24 11:05:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:43,052 INFO L225 Difference]: With dead ends: 107 [2021-10-24 11:05:43,052 INFO L226 Difference]: Without dead ends: 107 [2021-10-24 11:05:43,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 4276.9ms TimeCoverageRelationStatistics Valid=135, Invalid=464, Unknown=1, NotChecked=0, Total=600 [2021-10-24 11:05:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-24 11:05:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 61. [2021-10-24 11:05:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.26) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-10-24 11:05:43,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 24 [2021-10-24 11:05:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:43,056 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-10-24 11:05:43,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-10-24 11:05:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 11:05:43,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:43,057 INFO L512 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] [2021-10-24 11:05:43,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-10-24 11:05:43,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:43,270 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1565587052, now seen corresponding path program 1 times [2021-10-24 11:05:43,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:43,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403449125] [2021-10-24 11:05:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:43,270 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:43,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:43,271 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:43,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-24 11:05:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:43,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 11:05:43,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:43,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:43,807 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-24 11:05:43,807 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 20 treesize of output 19 [2021-10-24 11:05:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:43,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:43,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403449125] [2021-10-24 11:05:43,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403449125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:43,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:43,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 11:05:43,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539302939] [2021-10-24 11:05:43,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 11:05:43,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 11:05:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:43,841 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2021-10-24 11:05:44,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:44,043 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-24 11:05:44,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:05:44,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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 [2021-10-24 11:05:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:44,045 INFO L225 Difference]: With dead ends: 66 [2021-10-24 11:05:44,045 INFO L226 Difference]: Without dead ends: 66 [2021-10-24 11:05:44,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:05:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-24 11:05:44,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-24 11:05:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.24) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-10-24 11:05:44,047 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 27 [2021-10-24 11:05:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:44,048 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-10-24 11:05:44,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 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) [2021-10-24 11:05:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-10-24 11:05:44,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 11:05:44,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:44,048 INFO L512 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] [2021-10-24 11:05:44,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:44,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:44,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:44,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:44,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1565587051, now seen corresponding path program 1 times [2021-10-24 11:05:44,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:44,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819245687] [2021-10-24 11:05:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:44,252 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:44,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:44,253 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:44,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-24 11:05:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-24 11:05:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:44,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:44,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:45,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 11:05:45,062 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 24 treesize of output 28 [2021-10-24 11:05:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:45,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:45,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819245687] [2021-10-24 11:05:45,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819245687] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:45,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:45,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-24 11:05:45,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707702746] [2021-10-24 11:05:45,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 11:05:45,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:45,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 11:05:45,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-24 11:05:45,661 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:46,080 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-10-24 11:05:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 11:05:46,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-24 11:05:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:46,081 INFO L225 Difference]: With dead ends: 59 [2021-10-24 11:05:46,081 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 11:05:46,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-24 11:05:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 11:05:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-24 11:05:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.22) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-10-24 11:05:46,088 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 27 [2021-10-24 11:05:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:46,088 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-10-24 11:05:46,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-10-24 11:05:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:05:46,089 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:46,089 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:46,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:46,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:46,302 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 239500490, now seen corresponding path program 1 times [2021-10-24 11:05:46,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:46,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332514238] [2021-10-24 11:05:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:46,303 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:46,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:46,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-24 11:05:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-24 11:05:46,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:47,073 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 [2021-10-24 11:05:47,087 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 [2021-10-24 11:05:47,210 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 29 treesize of output 21 [2021-10-24 11:05:47,214 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 18 treesize of output 10 [2021-10-24 11:05:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:47,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:47,529 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 38 treesize of output 32 [2021-10-24 11:05:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:05:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 11:05:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:47,728 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:47,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332514238] [2021-10-24 11:05:47,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332514238] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:47,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:47,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 16 [2021-10-24 11:05:47,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300684282] [2021-10-24 11:05:47,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-24 11:05:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-24 11:05:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-24 11:05:47,730 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-10-24 11:05:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:48,577 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-24 11:05:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-24 11:05:48,577 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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 32 [2021-10-24 11:05:48,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:48,578 INFO L225 Difference]: With dead ends: 53 [2021-10-24 11:05:48,578 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 11:05:48,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 928.8ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-24 11:05:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 11:05:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-24 11:05:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 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) [2021-10-24 11:05:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-10-24 11:05:48,579 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 32 [2021-10-24 11:05:48,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:48,580 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-10-24 11:05:48,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 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) [2021-10-24 11:05:48,580 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-10-24 11:05:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-24 11:05:48,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:48,581 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:48,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-10-24 11:05:48,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:48,793 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:48,794 INFO L82 PathProgramCache]: Analyzing trace with hash 239500747, now seen corresponding path program 1 times [2021-10-24 11:05:48,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:48,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446269219] [2021-10-24 11:05:48,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:48,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:48,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:48,795 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:48,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-24 11:05:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:05:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:49,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:49,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446269219] [2021-10-24 11:05:49,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446269219] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:49,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 11:05:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250092695] [2021-10-24 11:05:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:05:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:05:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:49,606 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:49,655 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-24 11:05:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:05:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-24 11:05:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:49,656 INFO L225 Difference]: With dead ends: 52 [2021-10-24 11:05:49,656 INFO L226 Difference]: Without dead ends: 52 [2021-10-24 11:05:49,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-24 11:05:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-24 11:05:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 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) [2021-10-24 11:05:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-24 11:05:49,657 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 32 [2021-10-24 11:05:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:49,658 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-24 11:05:49,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-24 11:05:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-24 11:05:49,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:49,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:49,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:49,859 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:49,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:49,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1165411295, now seen corresponding path program 1 times [2021-10-24 11:05:49,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:49,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036064038] [2021-10-24 11:05:49,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:49,860 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:49,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:49,861 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:49,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-24 11:05:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:05:50,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:50,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:50,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:50,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036064038] [2021-10-24 11:05:50,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036064038] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:50,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-24 11:05:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053179221] [2021-10-24 11:05:50,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:05:50,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:50,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:05:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:05:50,988 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:51,148 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-10-24 11:05:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:05:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-24 11:05:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:51,149 INFO L225 Difference]: With dead ends: 51 [2021-10-24 11:05:51,149 INFO L226 Difference]: Without dead ends: 51 [2021-10-24 11:05:51,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-24 11:05:51,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-24 11:05:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-24 11:05:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-24 11:05:51,151 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 33 [2021-10-24 11:05:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:51,152 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-24 11:05:51,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-24 11:05:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-24 11:05:51,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:51,153 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:51,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:51,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:51,359 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1768011635, now seen corresponding path program 1 times [2021-10-24 11:05:51,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:51,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613379984] [2021-10-24 11:05:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:51,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:51,360 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:51,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-24 11:05:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:51,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:05:51,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:51,853 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 [2021-10-24 11:05:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:51,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:52,067 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:52,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613379984] [2021-10-24 11:05:52,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613379984] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:52,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:52,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 11:05:52,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258426588] [2021-10-24 11:05:52,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 11:05:52,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 11:05:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 11:05:52,068 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:05:52,206 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-24 11:05:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 11:05:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-24 11:05:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:05:52,206 INFO L225 Difference]: With dead ends: 63 [2021-10-24 11:05:52,206 INFO L226 Difference]: Without dead ends: 63 [2021-10-24 11:05:52,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 11:05:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-24 11:05:52,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-10-24 11:05:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 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) [2021-10-24 11:05:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-24 11:05:52,208 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 34 [2021-10-24 11:05:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:05:52,208 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-24 11:05:52,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:05:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-24 11:05:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-24 11:05:52,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:05:52,209 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:05:52,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-24 11:05:52,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:05:52,409 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:05:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:05:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1650523386, now seen corresponding path program 1 times [2021-10-24 11:05:52,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:05:52,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561432072] [2021-10-24 11:05:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:05:52,410 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:05:52,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:05:52,411 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:05:52,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-24 11:05:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:05:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 11:05:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:05:52,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 11:05:53,036 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-24 11:05:53,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-10-24 11:05:53,579 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-24 11:05:53,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2021-10-24 11:05:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:53,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:05:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:05:55,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:05:55,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561432072] [2021-10-24 11:05:55,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561432072] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:05:55,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:05:55,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-24 11:05:55,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209602806] [2021-10-24 11:05:55,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 11:05:55,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:05:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 11:05:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2021-10-24 11:05:55,994 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:06:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:06:24,512 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-10-24 11:06:24,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-24 11:06:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-24 11:06:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:06:24,513 INFO L225 Difference]: With dead ends: 65 [2021-10-24 11:06:24,513 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 11:06:24,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 12380.7ms TimeCoverageRelationStatistics Valid=61, Invalid=147, Unknown=2, NotChecked=0, Total=210 [2021-10-24 11:06:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 11:06:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2021-10-24 11:06:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:06:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-10-24 11:06:24,515 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 37 [2021-10-24 11:06:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:06:24,515 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-10-24 11:06:24,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.111111111111111) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:06:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-10-24 11:06:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-24 11:06:24,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:06:24,516 INFO L512 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] [2021-10-24 11:06:24,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-24 11:06:24,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:06:24,719 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:06:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:06:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1956436716, now seen corresponding path program 1 times [2021-10-24 11:06:24,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:06:24,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893267816] [2021-10-24 11:06:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:06:24,720 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:06:24,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:06:24,721 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:06:24,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-24 11:06:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:06:25,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-24 11:06:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:06:25,290 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 [2021-10-24 11:06:25,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-24 11:06:25,325 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 [2021-10-24 11:06:25,427 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-24 11:06:25,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-10-24 11:06:26,009 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-24 11:06:26,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-10-24 11:06:26,279 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-24 11:06:26,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 54 [2021-10-24 11:06:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:06:26,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:06:33,185 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-24 11:06:33,185 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 55 treesize of output 50 [2021-10-24 11:06:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:06:33,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:06:33,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893267816] [2021-10-24 11:06:33,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893267816] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:06:33,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:06:33,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 16 [2021-10-24 11:06:33,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229899903] [2021-10-24 11:06:33,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-24 11:06:33,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:06:33,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-24 11:06:33,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=200, Unknown=3, NotChecked=0, Total=272 [2021-10-24 11:06:33,225 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:07:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:07:18,180 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-10-24 11:07:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-24 11:07:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-24 11:07:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:07:18,181 INFO L225 Difference]: With dead ends: 69 [2021-10-24 11:07:18,182 INFO L226 Difference]: Without dead ends: 69 [2021-10-24 11:07:18,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 17031.1ms TimeCoverageRelationStatistics Valid=158, Invalid=438, Unknown=4, NotChecked=0, Total=600 [2021-10-24 11:07:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-24 11:07:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2021-10-24 11:07:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:07:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-24 11:07:18,184 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 40 [2021-10-24 11:07:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:07:18,185 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-24 11:07:18,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:07:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-24 11:07:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-24 11:07:18,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:07:18,186 INFO L512 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] [2021-10-24 11:07:18,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-24 11:07:18,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:07:18,395 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:07:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:07:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash -519995891, now seen corresponding path program 1 times [2021-10-24 11:07:18,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:07:18,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576933209] [2021-10-24 11:07:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:07:18,395 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:07:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:07:18,396 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:07:18,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-24 11:07:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:07:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 11:07:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:07:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:07:26,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:07:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:07:47,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:07:47,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576933209] [2021-10-24 11:07:47,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576933209] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:07:47,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:07:47,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-10-24 11:07:47,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741014644] [2021-10-24 11:07:47,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-24 11:07:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:07:47,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-24 11:07:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=350, Unknown=12, NotChecked=0, Total=420 [2021-10-24 11:07:47,973 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 20 states have (on average 4.05) internal successors, (81), 21 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) [2021-10-24 11:08:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:08:09,286 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-10-24 11:08:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-24 11:08:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.05) internal successors, (81), 21 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 41 [2021-10-24 11:08:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:08:09,287 INFO L225 Difference]: With dead ends: 68 [2021-10-24 11:08:09,287 INFO L226 Difference]: Without dead ends: 43 [2021-10-24 11:08:09,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 31676.9ms TimeCoverageRelationStatistics Valid=109, Invalid=579, Unknown=14, NotChecked=0, Total=702 [2021-10-24 11:08:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-24 11:08:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-24 11:08:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:08:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2021-10-24 11:08:09,290 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2021-10-24 11:08:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:08:09,290 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2021-10-24 11:08:09,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.05) internal successors, (81), 21 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) [2021-10-24 11:08:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2021-10-24 11:08:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-24 11:08:09,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:08:09,291 INFO L512 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] [2021-10-24 11:08:09,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-24 11:08:09,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:08:09,492 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-24 11:08:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:08:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash 430545156, now seen corresponding path program 1 times [2021-10-24 11:08:09,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:08:09,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963592927] [2021-10-24 11:08:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:08:09,493 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:08:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:08:09,494 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:08:09,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-24 11:08:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:08:10,252 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:08:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:08:10,528 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 11:08:10,529 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:08:10,530 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 11:08:10,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 11:08:10,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 11:08:10,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 11:08:10,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 11:08:10,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 11:08:10,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-24 11:08:10,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 11:08:10,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-24 11:08:10,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:08:10,742 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:08:10,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:08:10 BoogieIcfgContainer [2021-10-24 11:08:10,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:08:10,819 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:08:10,819 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:08:10,819 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:08:10,820 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:01:44" (3/4) ... [2021-10-24 11:08:10,823 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 11:08:10,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:08:10,824 INFO L168 Benchmark]: Toolchain (without parser) took 388422.87 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 49.2 MB in the beginning and 69.5 MB in the end (delta: -20.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,825 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory is still 67.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:08:10,825 INFO L168 Benchmark]: CACSL2BoogieTranslator took 812.08 ms. Allocated memory is still 86.0 MB. Free memory was 49.0 MB in the beginning and 51.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,825 INFO L168 Benchmark]: Boogie Procedure Inliner took 116.03 ms. Allocated memory is still 86.0 MB. Free memory was 51.0 MB in the beginning and 48.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,826 INFO L168 Benchmark]: Boogie Preprocessor took 88.24 ms. Allocated memory is still 86.0 MB. Free memory was 48.5 MB in the beginning and 46.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,826 INFO L168 Benchmark]: RCFGBuilder took 723.21 ms. Allocated memory is still 86.0 MB. Free memory was 46.4 MB in the beginning and 59.4 MB in the end (delta: -13.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,830 INFO L168 Benchmark]: TraceAbstraction took 386659.88 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 59.0 MB in the beginning and 69.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 61.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:08:10,831 INFO L168 Benchmark]: Witness Printer took 4.41 ms. Allocated memory is still 107.0 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:08:10,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 86.0 MB. Free memory is still 67.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 812.08 ms. Allocated memory is still 86.0 MB. Free memory was 49.0 MB in the beginning and 51.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 116.03 ms. Allocated memory is still 86.0 MB. Free memory was 51.0 MB in the beginning and 48.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.24 ms. Allocated memory is still 86.0 MB. Free memory was 48.5 MB in the beginning and 46.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 723.21 ms. Allocated memory is still 86.0 MB. Free memory was 46.4 MB in the beginning and 59.4 MB in the end (delta: -13.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 386659.88 ms. Allocated memory was 86.0 MB in the beginning and 107.0 MB in the end (delta: 21.0 MB). Free memory was 59.0 MB in the beginning and 69.5 MB in the end (delta: -10.5 MB). Peak memory consumption was 61.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.41 ms. Allocated memory is still 107.0 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 822]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 822. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={-134217728:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L802] struct ldv_i2c_client *c11 = (struct ldv_i2c_client *)ldv_malloc(sizeof(struct ldv_i2c_client)); [L803] COND FALSE !(!c11) [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L804-L805] struct ldv_m88ts2022_config *cfg = (struct ldv_m88ts2022_config *) ldv_malloc(sizeof(struct ldv_m88ts2022_config)); [L806] COND FALSE !(!cfg) VAL [ldv_global_msg_list={-134217728:0}] [L807] c11->dev.platform_data = cfg VAL [ldv_global_msg_list={-134217728:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L808-L809] struct ldv_dvb_frontend *fe = (struct ldv_dvb_frontend *) ldv_malloc(sizeof(struct ldv_dvb_frontend)); [L810] COND FALSE !(!fe) VAL [ldv_global_msg_list={-134217728:0}] [L811] cfg->fe = fe VAL [ldv_global_msg_list={-134217728:0}] [L784] EXPR client->dev.platform_data VAL [ldv_global_msg_list={-134217728:0}] [L784] struct ldv_m88ts2022_config *cfg = client->dev.platform_data; [L785] EXPR cfg->fe VAL [ldv_global_msg_list={-134217728:0}] [L785] struct ldv_dvb_frontend *fe = cfg->fe; [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L786] struct Data11 *priv = (struct Data11*)ldv_malloc(sizeof(struct Data11)); [L787] COND FALSE !(!priv) VAL [ldv_global_msg_list={-134217728:0}] [L788] fe->tuner_priv = priv VAL [ldv_global_msg_list={-134217728:0}] [L623] dev->driver_data = data VAL [ldv_global_msg_list={-134217728:0}] [L790] return 0; VAL [ldv_global_msg_list={-134217728:0}] [L619] EXPR dev->driver_data VAL [ldv_global_msg_list={-134217728:0}] [L619] return dev->driver_data; [L774] return ldv_dev_get_drvdata(&dev->dev); [L796] void *priv = (struct Data11*)ldv_i2c_get_clientdata(client); [L797] COND FALSE !(\read(*priv)) VAL [ldv_global_msg_list={-134217728:0}] [L814] free(fe) VAL [ldv_global_msg_list={-134217728:0}] [L814] free(fe) VAL [ldv_global_msg_list={-134217728:0}] [L814] free(fe) [L816] free(cfg) VAL [ldv_global_msg_list={-134217728:0}] [L816] free(cfg) VAL [ldv_global_msg_list={-134217728:0}] [L816] free(cfg) [L818] free(c11) VAL [ldv_global_msg_list={-134217728:0}] [L818] free(c11) VAL [ldv_global_msg_list={-134217728:0}] [L818] free(c11) - UnprovableResult [Line: 807]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 807]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 811]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 811]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 784]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 785]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 619]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 798]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 798]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 798]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 814]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 814]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 814]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 816]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 816]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 816]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 818]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 818]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 818]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 79 locations, 29 error locations. Started 1 CEGAR loops. OverallTime: 386512.7ms, OverallIterations: 34, TraceHistogramMax: 1, EmptinessCheckTime: 45.8ms, AutomataDifference: 186392.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1958 SDtfs, 9295 SDslu, 4691 SDs, 0 SdLazy, 6091 SolverSat, 698 SolverUnsat, 48 SolverUnknown, 0 SolverNotchecked, 124056.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1443 GetRequests, 972 SyntacticMatches, 37 SemanticMatches, 434 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 224298.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=11, InterpolantAutomatonStates: 323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 209.8ms AutomataMinimizationTime, 33 MinimizatonAttempts, 1948 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 309.8ms SsaConstructionTime, 1936.9ms SatisfiabilityAnalysisTime, 182927.3ms InterpolantComputationTime, 710 NumberOfCodeBlocks, 710 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 1270 ConstructedInterpolants, 166 QuantifiedInterpolants, 16128 SizeOfPredicates, 297 NumberOfNonLiveVariables, 2923 ConjunctsInSsa, 377 ConjunctsInUnsatCore, 66 InterpolantComputations, 66 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 11:08:10,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c4fe3ab-15b5-491c-b1f0-ebac4bda0467/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...