./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_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw --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_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw --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 [2021-10-20 06:15:23,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:15:23,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:15:23,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:15:23,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:15:23,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:15:23,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:15:23,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:15:23,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:15:23,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:15:23,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:15:23,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:15:23,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:15:23,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:15:23,812 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:15:23,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:15:23,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:15:23,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:15:23,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:15:23,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:15:23,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:15:23,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:15:23,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:15:23,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:15:23,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:15:23,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:15:23,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:15:23,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:15:23,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:15:23,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:15:23,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:15:23,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:15:23,837 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:15:23,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:15:23,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:15:23,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:15:23,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:15:23,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:15:23,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:15:23,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:15:23,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:15:23,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-20 06:15:23,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:15:23,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:15:23,872 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:15:23,872 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:15:23,872 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:15:23,873 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:15:23,873 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:15:23,873 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:15:23,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:15:23,874 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:15:23,874 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:15:23,874 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:15:23,874 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:15:23,875 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:15:23,875 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:15:23,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-20 06:15:23,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-20 06:15:23,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:15:23,876 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:15:23,877 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-20 06:15:23,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:15:23,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:15:23,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:15:23,878 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-20 06:15:23,878 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-20 06:15:23,878 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-20 06:15:23,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:15:23,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:15:23,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:15:23,879 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:15:23,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:15:23,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:15:23,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:15:23,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:15:23,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:15:23,881 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:15:23,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:15:23,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:15:23,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:15:23,882 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_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 [2021-10-20 06:15:24,145 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:15:24,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:15:24,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:15:24,172 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:15:24,178 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:15:24,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-20 06:15:24,273 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/1e1f494d1/5b1d9873a7444db998a091922f406e45/FLAGcfc7b5c9c [2021-10-20 06:15:24,859 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:15:24,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-20 06:15:24,873 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/1e1f494d1/5b1d9873a7444db998a091922f406e45/FLAGcfc7b5c9c [2021-10-20 06:15:25,126 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/1e1f494d1/5b1d9873a7444db998a091922f406e45 [2021-10-20 06:15:25,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:15:25,130 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:15:25,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:15:25,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:15:25,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:15:25,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:15:25" (1/1) ... [2021-10-20 06:15:25,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fbbae3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:25, skipping insertion in model container [2021-10-20 06:15:25,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:15:25" (1/1) ... [2021-10-20 06:15:25,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:15:25,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:15:25,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:15:25,758 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) [2021-10-20 06:15:25,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6faf95d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:25, skipping insertion in model container [2021-10-20 06:15:25,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:15:25,760 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-20 06:15:25,764 INFO L168 Benchmark]: Toolchain (without parser) took 630.79 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 64.3 MB in the beginning and 77.3 MB in the end (delta: -13.1 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-20 06:15:25,766 INFO L168 Benchmark]: CDTParser took 1.12 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 63.9 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:15:25,768 INFO L168 Benchmark]: CACSL2BoogieTranslator took 628.35 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 64.1 MB in the beginning and 77.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-20 06:15:25,772 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.12 ms. Allocated memory is still 86.0 MB. Free memory was 64.0 MB in the beginning and 63.9 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 628.35 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 64.1 MB in the beginning and 77.3 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.8 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 [2021-10-20 06:15:28,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:15:28,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:15:28,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:15:28,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:15:28,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:15:28,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:15:28,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:15:28,420 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:15:28,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:15:28,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:15:28,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:15:28,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:15:28,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:15:28,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:15:28,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:15:28,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:15:28,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:15:28,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:15:28,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:15:28,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:15:28,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:15:28,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:15:28,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:15:28,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:15:28,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:15:28,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:15:28,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:15:28,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:15:28,491 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:15:28,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:15:28,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:15:28,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:15:28,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:15:28,498 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:15:28,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:15:28,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:15:28,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:15:28,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:15:28,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:15:28,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:15:28,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-20 06:15:28,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:15:28,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:15:28,565 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:15:28,566 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:15:28,566 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:15:28,566 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:15:28,566 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:15:28,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:15:28,568 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:15:28,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-20 06:15:28,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-20 06:15:28,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:15:28,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:15:28,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-20 06:15:28,573 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:15:28,573 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:15:28,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:15:28,573 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-20 06:15:28,574 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-20 06:15:28,574 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-20 06:15:28,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:15:28,575 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:15:28,575 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-20 06:15:28,575 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-20 06:15:28,575 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:15:28,576 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:15:28,576 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:15:28,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-20 06:15:28,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:15:28,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:15:28,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:15:28,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:15:28,578 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-20 06:15:28,579 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-20 06:15:28,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:15:28,579 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:15:28,580 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_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c492ba1908c68ae7fad42ab0faa06b28fe0f7f3fdd04d2f1af5f4f1b8416a55 [2021-10-20 06:15:29,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:15:29,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:15:29,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:15:29,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:15:29,091 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:15:29,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-20 06:15:29,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/b3831acd4/0c535cf08a68407088d47fad737d3d02/FLAG6b1a7e26d [2021-10-20 06:15:29,879 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:15:29,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/sv-benchmarks/c/ldv-memsafety/memleaks_test11_2.i [2021-10-20 06:15:29,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/b3831acd4/0c535cf08a68407088d47fad737d3d02/FLAG6b1a7e26d [2021-10-20 06:15:30,153 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/data/b3831acd4/0c535cf08a68407088d47fad737d3d02 [2021-10-20 06:15:30,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:15:30,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:15:30,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:15:30,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:15:30,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:15:30,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:15:30" (1/1) ... [2021-10-20 06:15:30,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff6414a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:30, skipping insertion in model container [2021-10-20 06:15:30,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:15:30" (1/1) ... [2021-10-20 06:15:30,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:15:30,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:15:30,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:15:30,814 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-20 06:15:30,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:15:30,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:15:30,887 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:15:30,976 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:15:31,059 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:15:31,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31 WrapperNode [2021-10-20 06:15:31,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:15:31,061 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:15:31,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:15:31,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:15:31,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,126 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:15:31,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:15:31,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:15:31,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:15:31,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:15:31,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:15:31,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:15:31,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:15:31,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (1/1) ... [2021-10-20 06:15:31,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:15:31,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:15:31,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:15:31,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:15:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-20 06:15:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-20 06:15:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:15:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-20 06:15:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-20 06:15:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-20 06:15:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:15:31,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:15:31,977 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:15:31,977 INFO L299 CfgBuilder]: Removed 30 assume(true) statements. [2021-10-20 06:15:31,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:15:31 BoogieIcfgContainer [2021-10-20 06:15:31,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:15:31,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:15:31,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:15:31,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:15:31,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:15:30" (1/3) ... [2021-10-20 06:15:31,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa3caaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:15:31, skipping insertion in model container [2021-10-20 06:15:31,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:15:31" (2/3) ... [2021-10-20 06:15:31,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa3caaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:15:31, skipping insertion in model container [2021-10-20 06:15:31,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:15:31" (3/3) ... [2021-10-20 06:15:31,989 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test11_2.i [2021-10-20 06:15:31,995 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:15:31,995 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2021-10-20 06:15:32,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:15:32,059 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 [2021-10-20 06:15:32,060 INFO L340 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2021-10-20 06:15:32,099 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) [2021-10-20 06:15:32,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 06:15:32,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:32,120 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-20 06:15:32,121 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)] === [2021-10-20 06:15:32,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 889508829, now seen corresponding path program 1 times [2021-10-20 06:15:32,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:32,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425923159] [2021-10-20 06:15:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:32,144 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:32,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:32,152 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:32,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-20 06:15:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:15:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:32,407 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:32,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425923159] [2021-10-20 06:15:32,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425923159] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:32,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:32,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:15:32,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66033931] [2021-10-20 06:15:32,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:32,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:32,435 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) [2021-10-20 06:15:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:32,625 INFO L93 Difference]: Finished difference Result 295 states and 317 transitions. [2021-10-20 06:15:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:15:32,627 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 [2021-10-20 06:15:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:32,640 INFO L225 Difference]: With dead ends: 295 [2021-10-20 06:15:32,640 INFO L226 Difference]: Without dead ends: 287 [2021-10-20 06:15:32,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-20 06:15:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 79. [2021-10-20 06:15:32,686 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) [2021-10-20 06:15:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-10-20 06:15:32,689 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 6 [2021-10-20 06:15:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:32,689 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-10-20 06:15:32,689 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) [2021-10-20 06:15:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-10-20 06:15:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-20 06:15:32,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:32,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-20 06:15:32,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:32,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:32,905 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)] === [2021-10-20 06:15:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 889568411, now seen corresponding path program 1 times [2021-10-20 06:15:32,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:32,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385405388] [2021-10-20 06:15:32,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:32,907 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:32,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:32,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:32,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-20 06:15:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-20 06:15:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:33,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:33,049 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:33,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385405388] [2021-10-20 06:15:33,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385405388] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:33,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:33,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-20 06:15:33,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971110219] [2021-10-20 06:15:33,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:15:33,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:15:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:15:33,061 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) [2021-10-20 06:15:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:33,277 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2021-10-20 06:15:33,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:15:33,278 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 [2021-10-20 06:15:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:33,280 INFO L225 Difference]: With dead ends: 150 [2021-10-20 06:15:33,280 INFO L226 Difference]: Without dead ends: 149 [2021-10-20 06:15:33,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:15:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-20 06:15:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 77. [2021-10-20 06:15:33,289 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) [2021-10-20 06:15:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-10-20 06:15:33,290 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 6 [2021-10-20 06:15:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-10-20 06:15:33,291 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) [2021-10-20 06:15:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-10-20 06:15:33,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:15:33,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:33,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:33,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:33,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:33,493 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)] === [2021-10-20 06:15:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash -592189876, now seen corresponding path program 1 times [2021-10-20 06:15:33,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:33,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992414412] [2021-10-20 06:15:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:33,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:33,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:33,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:33,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-20 06:15:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:15:33,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:33,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:33,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:33,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992414412] [2021-10-20 06:15:33,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992414412] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:33,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:33,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:15:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746507931] [2021-10-20 06:15:33,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:33,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:33,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:33,698 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) [2021-10-20 06:15:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:33,849 INFO L93 Difference]: Finished difference Result 274 states and 291 transitions. [2021-10-20 06:15:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:15:33,850 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 [2021-10-20 06:15:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:33,852 INFO L225 Difference]: With dead ends: 274 [2021-10-20 06:15:33,852 INFO L226 Difference]: Without dead ends: 274 [2021-10-20 06:15:33,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-10-20 06:15:33,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 79. [2021-10-20 06:15:33,862 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) [2021-10-20 06:15:33,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-10-20 06:15:33,863 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 9 [2021-10-20 06:15:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:33,864 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-10-20 06:15:33,870 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) [2021-10-20 06:15:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-10-20 06:15:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:15:33,870 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:33,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:33,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-20 06:15:34,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:34,082 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:15:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:34,083 INFO L82 PathProgramCache]: Analyzing trace with hash -592189907, now seen corresponding path program 1 times [2021-10-20 06:15:34,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:34,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115350746] [2021-10-20 06:15:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:34,084 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:34,085 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:34,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-20 06:15:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:34,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-20 06:15:34,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:34,208 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 [2021-10-20 06:15:34,254 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-20 06:15:34,255 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 [2021-10-20 06:15:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:34,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:34,350 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:34,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115350746] [2021-10-20 06:15:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115350746] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:34,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:34,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:15:34,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40074189] [2021-10-20 06:15:34,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:34,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:34,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:34,354 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) [2021-10-20 06:15:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:34,634 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-10-20 06:15:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:15:34,635 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 [2021-10-20 06:15:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:34,638 INFO L225 Difference]: With dead ends: 166 [2021-10-20 06:15:34,638 INFO L226 Difference]: Without dead ends: 166 [2021-10-20 06:15:34,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-20 06:15:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 90. [2021-10-20 06:15:34,647 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) [2021-10-20 06:15:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2021-10-20 06:15:34,648 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 9 [2021-10-20 06:15:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:34,649 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2021-10-20 06:15:34,649 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) [2021-10-20 06:15:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2021-10-20 06:15:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:15:34,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:34,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:34,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:34,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:34,864 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:15:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:34,865 INFO L82 PathProgramCache]: Analyzing trace with hash -592189906, now seen corresponding path program 1 times [2021-10-20 06:15:34,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:34,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696689443] [2021-10-20 06:15:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:34,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:34,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:34,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:34,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-20 06:15:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:34,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-20 06:15:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:34,998 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 [2021-10-20 06:15:35,005 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 [2021-10-20 06:15:35,122 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-20 06:15:35,123 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 [2021-10-20 06:15:35,136 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:15:35,137 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 [2021-10-20 06:15:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:35,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:39,807 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 [2021-10-20 06:15:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:39,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:39,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696689443] [2021-10-20 06:15:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696689443] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:39,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:39,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-20 06:15:39,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934121173] [2021-10-20 06:15:39,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 06:15:39,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 06:15:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=65, Unknown=2, NotChecked=0, Total=90 [2021-10-20 06:15:39,860 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) [2021-10-20 06:15:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:47,724 INFO L93 Difference]: Finished difference Result 303 states and 322 transitions. [2021-10-20 06:15:47,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 06:15:47,725 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 [2021-10-20 06:15:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:47,727 INFO L225 Difference]: With dead ends: 303 [2021-10-20 06:15:47,727 INFO L226 Difference]: Without dead ends: 303 [2021-10-20 06:15:47,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 5131.5ms TimeCoverageRelationStatistics Valid=101, Invalid=239, Unknown=2, NotChecked=0, Total=342 [2021-10-20 06:15:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-20 06:15:47,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 126. [2021-10-20 06:15:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 97 states have (on average 1.690721649484536) internal successors, (164), 125 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:15:47,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2021-10-20 06:15:47,736 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 9 [2021-10-20 06:15:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:47,736 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2021-10-20 06:15:47,737 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) [2021-10-20 06:15:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2021-10-20 06:15:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-20 06:15:47,737 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:47,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:47,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:47,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:47,954 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:15:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1182817455, now seen corresponding path program 1 times [2021-10-20 06:15:47,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:47,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506240763] [2021-10-20 06:15:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:47,956 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:47,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:47,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:47,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-20 06:15:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-20 06:15:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:48,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:48,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:48,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506240763] [2021-10-20 06:15:48,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506240763] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:48,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:48,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:15:48,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807870662] [2021-10-20 06:15:48,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:48,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:48,121 INFO L87 Difference]: Start difference. First operand 126 states and 164 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) [2021-10-20 06:15:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:48,214 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2021-10-20 06:15:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:15:48,215 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 [2021-10-20 06:15:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:48,216 INFO L225 Difference]: With dead ends: 145 [2021-10-20 06:15:48,216 INFO L226 Difference]: Without dead ends: 143 [2021-10-20 06:15:48,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-20 06:15:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 79. [2021-10-20 06:15:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.6226415094339623) 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) [2021-10-20 06:15:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-10-20 06:15:48,223 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 9 [2021-10-20 06:15:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:48,223 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-10-20 06:15:48,223 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) [2021-10-20 06:15:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-10-20 06:15:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-20 06:15:48,224 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:48,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:48,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-20 06:15:48,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:48,437 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)] === [2021-10-20 06:15:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1176169776, now seen corresponding path program 1 times [2021-10-20 06:15:48,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:48,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770612138] [2021-10-20 06:15:48,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:48,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:48,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:48,439 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:48,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-20 06:15:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:48,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-20 06:15:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:48,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:48,759 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:48,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770612138] [2021-10-20 06:15:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770612138] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:48,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:48,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-20 06:15:48,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076596577] [2021-10-20 06:15:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 06:15:48,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 06:15:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:15:48,761 INFO L87 Difference]: Start difference. First operand 79 states and 86 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) [2021-10-20 06:15:48,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:48,966 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2021-10-20 06:15:48,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:15:48,967 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 [2021-10-20 06:15:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:48,968 INFO L225 Difference]: With dead ends: 141 [2021-10-20 06:15:48,968 INFO L226 Difference]: Without dead ends: 141 [2021-10-20 06:15:48,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-10-20 06:15:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-20 06:15:48,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 78. [2021-10-20 06:15:48,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 77 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) [2021-10-20 06:15:48,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-10-20 06:15:48,974 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 10 [2021-10-20 06:15:48,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:48,975 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-10-20 06:15:48,975 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) [2021-10-20 06:15:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-10-20 06:15:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-20 06:15:48,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:48,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:48,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:49,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:49,192 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)] === [2021-10-20 06:15:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:49,193 INFO L82 PathProgramCache]: Analyzing trace with hash -722750891, now seen corresponding path program 1 times [2021-10-20 06:15:49,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:49,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [215694806] [2021-10-20 06:15:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:49,194 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:49,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:49,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:49,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-20 06:15:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:15:49,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:49,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:55,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:55,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:55,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [215694806] [2021-10-20 06:15:55,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [215694806] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:55,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:55,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-20 06:15:55,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474472014] [2021-10-20 06:15:55,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 06:15:55,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:55,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 06:15:55,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=49, Unknown=3, NotChecked=0, Total=72 [2021-10-20 06:15:55,669 INFO L87 Difference]: Start difference. First operand 78 states and 84 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) [2021-10-20 06:15:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:56,515 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2021-10-20 06:15:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:15:56,516 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 [2021-10-20 06:15:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:56,517 INFO L225 Difference]: With dead ends: 138 [2021-10-20 06:15:56,517 INFO L226 Difference]: Without dead ends: 134 [2021-10-20 06:15:56,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 6188.3ms TimeCoverageRelationStatistics Valid=32, Invalid=75, Unknown=3, NotChecked=0, Total=110 [2021-10-20 06:15:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-20 06:15:56,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 73. [2021-10-20 06:15:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.625) internal successors, (78), 72 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) [2021-10-20 06:15:56,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-10-20 06:15:56,522 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 12 [2021-10-20 06:15:56,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:56,523 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-10-20 06:15:56,523 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) [2021-10-20 06:15:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-10-20 06:15:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 06:15:56,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:56,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:56,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-20 06:15:56,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:56,734 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)] === [2021-10-20 06:15:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash -493394208, now seen corresponding path program 1 times [2021-10-20 06:15:56,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:56,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789415948] [2021-10-20 06:15:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:56,735 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:56,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:56,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:56,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-20 06:15:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:56,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:15:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:56,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:56,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:56,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789415948] [2021-10-20 06:15:56,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789415948] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:56,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:56,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:15:56,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243468278] [2021-10-20 06:15:56,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:56,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:56,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:56,959 INFO L87 Difference]: Start difference. First operand 73 states and 78 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) [2021-10-20 06:15:57,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:57,028 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2021-10-20 06:15:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:15:57,028 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 [2021-10-20 06:15:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:57,030 INFO L225 Difference]: With dead ends: 231 [2021-10-20 06:15:57,030 INFO L226 Difference]: Without dead ends: 231 [2021-10-20 06:15:57,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-10-20 06:15:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 75. [2021-10-20 06:15:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.6) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:15:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-10-20 06:15:57,035 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 14 [2021-10-20 06:15:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:57,035 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-10-20 06:15:57,035 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) [2021-10-20 06:15:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-10-20 06:15:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 06:15:57,036 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:57,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:57,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:57,248 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:15:57,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:57,249 INFO L82 PathProgramCache]: Analyzing trace with hash -493394216, now seen corresponding path program 1 times [2021-10-20 06:15:57,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:57,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763910539] [2021-10-20 06:15:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:57,250 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:57,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:57,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:57,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-20 06:15:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:57,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-20 06:15:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:57,399 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 [2021-10-20 06:15:57,473 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-20 06:15:57,474 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 [2021-10-20 06:15:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:15:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:57,601 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:15:57,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763910539] [2021-10-20 06:15:57,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763910539] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:15:57,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:15:57,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:15:57,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206800361] [2021-10-20 06:15:57,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:15:57,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:15:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:15:57,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:15:57,604 INFO L87 Difference]: Start difference. First operand 75 states and 80 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) [2021-10-20 06:15:57,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:15:57,860 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2021-10-20 06:15:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:15:57,860 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 [2021-10-20 06:15:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:15:57,862 INFO L225 Difference]: With dead ends: 146 [2021-10-20 06:15:57,862 INFO L226 Difference]: Without dead ends: 146 [2021-10-20 06:15:57,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:15:57,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-20 06:15:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2021-10-20 06:15:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 87 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:15:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-10-20 06:15:57,866 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 14 [2021-10-20 06:15:57,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:15:57,866 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-10-20 06:15:57,867 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) [2021-10-20 06:15:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-10-20 06:15:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 06:15:57,867 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:15:57,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:15:57,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-20 06:15:58,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:15:58,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:15:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:15:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash -493394215, now seen corresponding path program 1 times [2021-10-20 06:15:58,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:15:58,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875172937] [2021-10-20 06:15:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:15:58,078 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:15:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:15:58,080 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:15:58,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-20 06:15:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:15:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-20 06:15:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:15:58,248 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 [2021-10-20 06:15:58,254 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 [2021-10-20 06:15:58,389 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-20 06:15:58,389 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 [2021-10-20 06:15:58,401 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:15:58,402 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 [2021-10-20 06:15:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:15:58,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:01,050 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 [2021-10-20 06:16:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:01,095 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:01,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875172937] [2021-10-20 06:16:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875172937] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:01,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:01,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-20 06:16:01,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835089665] [2021-10-20 06:16:01,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 06:16:01,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 06:16:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-10-20 06:16:01,098 INFO L87 Difference]: Start difference. First operand 88 states and 98 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) [2021-10-20 06:16:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:09,432 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-10-20 06:16:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-20 06:16:09,433 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 [2021-10-20 06:16:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:09,435 INFO L225 Difference]: With dead ends: 267 [2021-10-20 06:16:09,435 INFO L226 Difference]: Without dead ends: 267 [2021-10-20 06:16:09,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 5573.8ms TimeCoverageRelationStatistics Valid=149, Invalid=356, Unknown=1, NotChecked=0, Total=506 [2021-10-20 06:16:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-20 06:16:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 116. [2021-10-20 06:16:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 115 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:16:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2021-10-20 06:16:09,442 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 14 [2021-10-20 06:16:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:09,442 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2021-10-20 06:16:09,442 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) [2021-10-20 06:16:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2021-10-20 06:16:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-20 06:16:09,443 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:09,443 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:09,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-20 06:16:09,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:09,650 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 186664154, now seen corresponding path program 1 times [2021-10-20 06:16:09,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:09,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380020343] [2021-10-20 06:16:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:09,651 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:09,652 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:09,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-20 06:16:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:09,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-20 06:16:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:09,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:09,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380020343] [2021-10-20 06:16:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380020343] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:09,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:09,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:16:09,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277230530] [2021-10-20 06:16:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:16:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:16:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:16:09,908 INFO L87 Difference]: Start difference. First operand 116 states and 145 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) [2021-10-20 06:16:09,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:09,992 INFO L93 Difference]: Finished difference Result 133 states and 139 transitions. [2021-10-20 06:16:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:16:09,992 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 [2021-10-20 06:16:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:09,993 INFO L225 Difference]: With dead ends: 133 [2021-10-20 06:16:09,994 INFO L226 Difference]: Without dead ends: 131 [2021-10-20 06:16:09,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:16:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-20 06:16:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 75. [2021-10-20 06:16:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.509433962264151) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:16:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-10-20 06:16:09,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 14 [2021-10-20 06:16:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-10-20 06:16:09,997 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) [2021-10-20 06:16:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-10-20 06:16:09,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-20 06:16:09,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:09,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:10,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:10,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:10,209 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)] === [2021-10-20 06:16:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1886495925, now seen corresponding path program 1 times [2021-10-20 06:16:10,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:10,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1319141910] [2021-10-20 06:16:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:10,210 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:10,211 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:10,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-20 06:16:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:10,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:16:10,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:10,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:10,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:10,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1319141910] [2021-10-20 06:16:10,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1319141910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:10,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:10,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-20 06:16:10,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026991988] [2021-10-20 06:16:10,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 06:16:10,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 06:16:10,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:16:10,846 INFO L87 Difference]: Start difference. First operand 75 states and 80 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) [2021-10-20 06:16:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:11,055 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-10-20 06:16:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:16:11,056 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 [2021-10-20 06:16:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:11,056 INFO L225 Difference]: With dead ends: 74 [2021-10-20 06:16:11,056 INFO L226 Difference]: Without dead ends: 74 [2021-10-20 06:16:11,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-20 06:16:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-20 06:16:11,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-20 06:16:11,059 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) [2021-10-20 06:16:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-10-20 06:16:11,059 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 15 [2021-10-20 06:16:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-10-20 06:16:11,060 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) [2021-10-20 06:16:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-10-20 06:16:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 06:16:11,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:11,060 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:11,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:11,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:11,261 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1705438503, now seen corresponding path program 1 times [2021-10-20 06:16:11,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:11,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161646168] [2021-10-20 06:16:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:11,262 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:11,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:11,263 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:11,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-20 06:16:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 06:16:11,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:11,435 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 [2021-10-20 06:16:11,532 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-20 06:16:11,533 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 [2021-10-20 06:16:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:11,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:15,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:15,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161646168] [2021-10-20 06:16:15,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161646168] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:15,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:15,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 8 [2021-10-20 06:16:15,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214776007] [2021-10-20 06:16:15,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-20 06:16:15,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-20 06:16:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=42, Unknown=2, NotChecked=0, Total=72 [2021-10-20 06:16:15,858 INFO L87 Difference]: Start difference. First operand 74 states and 78 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) [2021-10-20 06:16:16,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:16,379 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2021-10-20 06:16:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 06:16:16,379 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 [2021-10-20 06:16:16,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:16,381 INFO L225 Difference]: With dead ends: 169 [2021-10-20 06:16:16,381 INFO L226 Difference]: Without dead ends: 169 [2021-10-20 06:16:16,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4207.0ms TimeCoverageRelationStatistics Valid=54, Invalid=76, Unknown=2, NotChecked=0, Total=132 [2021-10-20 06:16:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-20 06:16:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 73. [2021-10-20 06:16:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:16:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-10-20 06:16:16,383 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 16 [2021-10-20 06:16:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-10-20 06:16:16,384 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) [2021-10-20 06:16:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-10-20 06:16:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-20 06:16:16,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:16,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:16,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:16,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:16,585 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1705438502, now seen corresponding path program 1 times [2021-10-20 06:16:16,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:16,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394733350] [2021-10-20 06:16:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:16,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:16,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:16,587 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:16,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-20 06:16:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:16,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-20 06:16:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:16,827 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 [2021-10-20 06:16:16,833 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 [2021-10-20 06:16:16,929 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:16:16,929 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 [2021-10-20 06:16:16,941 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 [2021-10-20 06:16:17,091 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-20 06:16:17,091 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 [2021-10-20 06:16:17,116 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:16:17,116 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 [2021-10-20 06:16:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:17,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:19,648 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-20 06:16:19,649 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 [2021-10-20 06:16:20,246 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 [2021-10-20 06:16:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:20,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:20,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394733350] [2021-10-20 06:16:20,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394733350] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:20,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:20,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 12 [2021-10-20 06:16:20,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499715961] [2021-10-20 06:16:20,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-20 06:16:20,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:20,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-20 06:16:20,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2021-10-20 06:16:20,286 INFO L87 Difference]: Start difference. First operand 73 states and 77 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) [2021-10-20 06:16:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:28,545 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2021-10-20 06:16:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-20 06:16:28,546 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 [2021-10-20 06:16:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:28,548 INFO L225 Difference]: With dead ends: 173 [2021-10-20 06:16:28,548 INFO L226 Difference]: Without dead ends: 173 [2021-10-20 06:16:28,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5446.3ms TimeCoverageRelationStatistics Valid=135, Invalid=369, Unknown=2, NotChecked=0, Total=506 [2021-10-20 06:16:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-20 06:16:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 72. [2021-10-20 06:16:28,551 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) [2021-10-20 06:16:28,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-10-20 06:16:28,552 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 16 [2021-10-20 06:16:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:28,552 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-10-20 06:16:28,553 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) [2021-10-20 06:16:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-10-20 06:16:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:16:28,553 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:28,554 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:28,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:28,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:28,763 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1751106330, now seen corresponding path program 1 times [2021-10-20 06:16:28,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:28,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240078015] [2021-10-20 06:16:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:28,765 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:28,766 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:28,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-20 06:16:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-20 06:16:29,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:29,173 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 [2021-10-20 06:16:29,231 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 [2021-10-20 06:16:29,399 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-10-20 06:16:29,399 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 [2021-10-20 06:16:29,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:16:29,604 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 [2021-10-20 06:16:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:29,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:30,026 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-10-20 06:16:30,026 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 [2021-10-20 06:16:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:30,171 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:30,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240078015] [2021-10-20 06:16:30,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240078015] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:30,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:30,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 8] imperfect sequences [] total 18 [2021-10-20 06:16:30,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149081478] [2021-10-20 06:16:30,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-20 06:16:30,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:30,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-20 06:16:30,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-20 06:16:30,173 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) [2021-10-20 06:16:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:34,598 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2021-10-20 06:16:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-20 06:16:34,599 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 [2021-10-20 06:16:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:34,600 INFO L225 Difference]: With dead ends: 119 [2021-10-20 06:16:34,600 INFO L226 Difference]: Without dead ends: 119 [2021-10-20 06:16:34,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 3193.5ms TimeCoverageRelationStatistics Valid=301, Invalid=1031, Unknown=0, NotChecked=0, Total=1332 [2021-10-20 06:16:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-20 06:16:34,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2021-10-20 06:16:34,603 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) [2021-10-20 06:16:34,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-10-20 06:16:34,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 18 [2021-10-20 06:16:34,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:34,604 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-10-20 06:16:34,605 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) [2021-10-20 06:16:34,605 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-10-20 06:16:34,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:16:34,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:34,606 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:34,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:34,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:34,817 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:34,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1751106331, now seen corresponding path program 1 times [2021-10-20 06:16:34,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:34,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233921457] [2021-10-20 06:16:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:34,818 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:34,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:34,819 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:34,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-20 06:16:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:35,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-20 06:16:35,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:35,046 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 [2021-10-20 06:16:35,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:16:35,083 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 [2021-10-20 06:16:35,142 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 [2021-10-20 06:16:35,154 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 [2021-10-20 06:16:35,319 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:16:35,320 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 [2021-10-20 06:16:35,341 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:16:35,342 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 [2021-10-20 06:16:35,444 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 [2021-10-20 06:16:35,447 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 [2021-10-20 06:16:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:35,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:16:35,929 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 [2021-10-20 06:16:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:37,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:16:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:37,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:37,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233921457] [2021-10-20 06:16:37,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233921457] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:37,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:37,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-10-20 06:16:37,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161115739] [2021-10-20 06:16:37,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-20 06:16:37,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:37,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-20 06:16:37,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-10-20 06:16:37,519 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) [2021-10-20 06:16:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:41,053 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2021-10-20 06:16:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-20 06:16:41,054 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 [2021-10-20 06:16:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:41,055 INFO L225 Difference]: With dead ends: 139 [2021-10-20 06:16:41,055 INFO L226 Difference]: Without dead ends: 139 [2021-10-20 06:16:41,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 2875.3ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-10-20 06:16:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-20 06:16:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 79. [2021-10-20 06:16:41,057 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) [2021-10-20 06:16:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-10-20 06:16:41,057 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 18 [2021-10-20 06:16:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:41,058 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-10-20 06:16:41,058 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) [2021-10-20 06:16:41,058 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-10-20 06:16:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:16:41,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:41,058 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:16:41,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:41,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:41,259 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:16:41,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:41,259 INFO L82 PathProgramCache]: Analyzing trace with hash 941759704, now seen corresponding path program 1 times [2021-10-20 06:16:41,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:41,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251398570] [2021-10-20 06:16:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:41,260 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:41,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:41,261 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:41,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-20 06:16:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-20 06:16:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:41,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:41,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:41,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251398570] [2021-10-20 06:16:41,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251398570] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:41,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:41,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:16:41,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975032526] [2021-10-20 06:16:41,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:16:41,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:41,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:16:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:16:41,601 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) [2021-10-20 06:16:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:16:41,672 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-10-20 06:16:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:16:41,673 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 [2021-10-20 06:16:41,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:16:41,674 INFO L225 Difference]: With dead ends: 120 [2021-10-20 06:16:41,674 INFO L226 Difference]: Without dead ends: 120 [2021-10-20 06:16:41,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:16:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-20 06:16:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-10-20 06:16:41,676 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) [2021-10-20 06:16:41,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-10-20 06:16:41,677 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 18 [2021-10-20 06:16:41,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:16:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-10-20 06:16:41,677 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) [2021-10-20 06:16:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-10-20 06:16:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-20 06:16:41,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:16:41,681 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] [2021-10-20 06:16:41,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-20 06:16:41,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:16:41,893 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)] === [2021-10-20 06:16:41,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:16:41,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1179459719, now seen corresponding path program 1 times [2021-10-20 06:16:41,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:16:41,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157009188] [2021-10-20 06:16:41,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:16:41,894 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:16:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:16:41,895 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:16:41,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-20 06:16:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:16:42,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-20 06:16:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:16:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:44,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:16:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:16:53,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:16:53,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157009188] [2021-10-20 06:16:53,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157009188] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:16:53,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:16:53,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-10-20 06:16:53,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414920484] [2021-10-20 06:16:53,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-20 06:16:53,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:16:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-20 06:16:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=166, Unknown=5, NotChecked=0, Total=210 [2021-10-20 06:16:53,812 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) [2021-10-20 06:17:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:17:03,371 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-10-20 06:17:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-20 06:17:03,372 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 [2021-10-20 06:17:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:17:03,372 INFO L225 Difference]: With dead ends: 74 [2021-10-20 06:17:03,373 INFO L226 Difference]: Without dead ends: 65 [2021-10-20 06:17:03,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 13259.3ms TimeCoverageRelationStatistics Valid=76, Invalid=298, Unknown=6, NotChecked=0, Total=380 [2021-10-20 06:17:03,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-20 06:17:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-20 06:17:03,375 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) [2021-10-20 06:17:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-20 06:17:03,376 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 20 [2021-10-20 06:17:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:17:03,376 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-20 06:17:03,376 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) [2021-10-20 06:17:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-20 06:17:03,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-20 06:17:03,377 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:17:03,377 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] [2021-10-20 06:17:03,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-20 06:17:03,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:17:03,578 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:17:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:17:03,579 INFO L82 PathProgramCache]: Analyzing trace with hash -373354461, now seen corresponding path program 1 times [2021-10-20 06:17:03,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:17:03,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937915718] [2021-10-20 06:17:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:17:03,579 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:17:03,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:17:03,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:17:03,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-20 06:17:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:17:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-20 06:17:03,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:17:03,890 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 [2021-10-20 06:17:03,929 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:17:03,930 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 [2021-10-20 06:17:03,975 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 [2021-10-20 06:17:03,986 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 [2021-10-20 06:17:04,063 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 [2021-10-20 06:17:04,240 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:17:04,241 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 [2021-10-20 06:17:04,261 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:17:04,261 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 [2021-10-20 06:17:04,353 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 [2021-10-20 06:17:04,509 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-20 06:17:04,509 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 [2021-10-20 06:17:04,619 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-20 06:17:04,619 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 [2021-10-20 06:17:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:17:04,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:18:03,944 INFO L354 Elim1Store]: treesize reduction 43, result has 2.3 percent of original size [2021-10-20 06:18:03,944 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 [2021-10-20 06:18:05,965 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 [2021-10-20 06:18:06,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:18:06,042 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 [2021-10-20 06:18:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:18:06,400 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:18:06,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937915718] [2021-10-20 06:18:06,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937915718] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:18:06,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:18:06,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15, 15] imperfect sequences [] total 24 [2021-10-20 06:18:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088496325] [2021-10-20 06:18:06,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-20 06:18:06,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:18:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-20 06:18:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=471, Unknown=22, NotChecked=44, Total=600 [2021-10-20 06:18:06,402 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) [2021-10-20 06:18:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:18:23,117 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2021-10-20 06:18:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-20 06:18:23,117 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 [2021-10-20 06:18:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:18:23,118 INFO L225 Difference]: With dead ends: 120 [2021-10-20 06:18:23,118 INFO L226 Difference]: Without dead ends: 120 [2021-10-20 06:18:23,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 75854.3ms TimeCoverageRelationStatistics Valid=341, Invalid=1279, Unknown=24, NotChecked=78, Total=1722 [2021-10-20 06:18:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-20 06:18:23,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 64. [2021-10-20 06:18:23,121 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) [2021-10-20 06:18:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-10-20 06:18:23,122 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 23 [2021-10-20 06:18:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:18:23,122 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-10-20 06:18:23,122 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) [2021-10-20 06:18:23,122 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-10-20 06:18:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-20 06:18:23,123 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:18:23,123 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] [2021-10-20 06:18:23,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-20 06:18:23,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:18:23,326 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:18:23,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:18:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -373354460, now seen corresponding path program 1 times [2021-10-20 06:18:23,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:18:23,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083245249] [2021-10-20 06:18:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:18:23,327 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:18:23,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:18:23,329 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:18:23,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-20 06:18:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:18:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-20 06:18:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:18:23,728 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 [2021-10-20 06:18:23,791 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:18:23,791 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 [2021-10-20 06:18:23,837 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 [2021-10-20 06:18:23,848 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 [2021-10-20 06:18:23,961 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 [2021-10-20 06:18:23,981 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 [2021-10-20 06:18:24,243 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:18:24,243 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 [2021-10-20 06:18:24,276 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-20 06:18:24,277 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 [2021-10-20 06:18:24,794 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-20 06:18:24,794 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 [2021-10-20 06:18:24,811 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-20 06:18:24,812 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 [2021-10-20 06:18:25,045 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-20 06:18:25,045 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 [2021-10-20 06:18:25,063 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:18:25,063 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 [2021-10-20 06:18:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:18:25,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:18:37,600 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 [2021-10-20 06:18:37,605 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 [2021-10-20 06:19:15,803 WARN L207 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 32 [2021-10-20 06:19:37,030 WARN L207 SmtUtils]: Spent 6.48 s on a formula simplification that was a NOOP. DAG size: 31 [2021-10-20 06:19:37,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:19:37,065 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 [2021-10-20 06:19:37,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:19:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:19:37,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:19:37,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-20 06:19:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:19:37,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:19:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083245249] [2021-10-20 06:19:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083245249] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:19:37,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:19:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16, 16] imperfect sequences [] total 27 [2021-10-20 06:19:37,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937836890] [2021-10-20 06:19:37,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-20 06:19:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:19:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-20 06:19:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=656, Unknown=23, NotChecked=0, Total=756 [2021-10-20 06:19:37,233 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) [2021-10-20 06:20:09,794 WARN L207 SmtUtils]: Spent 19.18 s on a formula simplification. DAG size of input: 152 DAG size of output: 142 [2021-10-20 06:20:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:29,874 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2021-10-20 06:20:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-20 06:20:29,875 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 [2021-10-20 06:20:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:29,876 INFO L225 Difference]: With dead ends: 154 [2021-10-20 06:20:29,876 INFO L226 Difference]: Without dead ends: 154 [2021-10-20 06:20:29,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 104931.0ms TimeCoverageRelationStatistics Valid=401, Invalid=1830, Unknown=25, NotChecked=0, Total=2256 [2021-10-20 06:20:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-20 06:20:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 63. [2021-10-20 06:20:29,881 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) [2021-10-20 06:20:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-20 06:20:29,881 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 23 [2021-10-20 06:20:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:29,882 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-20 06:20:29,882 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) [2021-10-20 06:20:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-20 06:20:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-20 06:20:29,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:29,883 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] [2021-10-20 06:20:29,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:30,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:30,090 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:20:30,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:30,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1310912065, now seen corresponding path program 1 times [2021-10-20 06:20:30,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:30,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476172845] [2021-10-20 06:20:30,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:30,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:30,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:30,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:30,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-20 06:20:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:30,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:20:30,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:30,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:30,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:30,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:30,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476172845] [2021-10-20 06:20:30,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476172845] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:30,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:30,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:20:30,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540697840] [2021-10-20 06:20:30,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:20:30,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:30,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:20:30,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:20:30,554 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) [2021-10-20 06:20:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:30,626 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2021-10-20 06:20:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:20:30,631 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 [2021-10-20 06:20:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:30,632 INFO L225 Difference]: With dead ends: 101 [2021-10-20 06:20:30,632 INFO L226 Difference]: Without dead ends: 101 [2021-10-20 06:20:30,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:20:30,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-20 06:20:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-10-20 06:20:30,635 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) [2021-10-20 06:20:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-20 06:20:30,635 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 24 [2021-10-20 06:20:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:30,636 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-20 06:20:30,636 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) [2021-10-20 06:20:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-20 06:20:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-20 06:20:30,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:30,637 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] [2021-10-20 06:20:30,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:30,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:30,858 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:20:30,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1312759107, now seen corresponding path program 1 times [2021-10-20 06:20:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:30,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122385281] [2021-10-20 06:20:30,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:30,859 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:30,860 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:30,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-20 06:20:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:31,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:20:31,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:31,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:31,336 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:31,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122385281] [2021-10-20 06:20:31,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122385281] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:31,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:31,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:20:31,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889501476] [2021-10-20 06:20:31,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:20:31,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:31,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:20:31,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:20:31,338 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) [2021-10-20 06:20:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:31,510 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2021-10-20 06:20:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:20:31,511 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 [2021-10-20 06:20:31,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:31,512 INFO L225 Difference]: With dead ends: 69 [2021-10-20 06:20:31,512 INFO L226 Difference]: Without dead ends: 69 [2021-10-20 06:20:31,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:20:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-20 06:20:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2021-10-20 06:20:31,514 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) [2021-10-20 06:20:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-10-20 06:20:31,514 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 24 [2021-10-20 06:20:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:31,514 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-10-20 06:20:31,514 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) [2021-10-20 06:20:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-10-20 06:20:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-20 06:20:31,515 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:31,515 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] [2021-10-20 06:20:31,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:31,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:31,722 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:20:31,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:31,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1312759108, now seen corresponding path program 1 times [2021-10-20 06:20:31,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:31,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741920321] [2021-10-20 06:20:31,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:31,723 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:31,725 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:31,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-20 06:20:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:32,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-20 06:20:32,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:32,107 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 [2021-10-20 06:20:32,115 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 [2021-10-20 06:20:32,203 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:20:32,203 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 [2021-10-20 06:20:32,216 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 [2021-10-20 06:20:32,376 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-20 06:20:32,376 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 [2021-10-20 06:20:32,410 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:20:32,410 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 [2021-10-20 06:20:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:32,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:33,393 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-20 06:20:33,393 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 [2021-10-20 06:20:34,106 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 [2021-10-20 06:20:34,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:34,145 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:34,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741920321] [2021-10-20 06:20:34,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741920321] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:34,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:34,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-10-20 06:20:34,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912567546] [2021-10-20 06:20:34,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-20 06:20:34,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:34,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-20 06:20:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-10-20 06:20:34,147 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) [2021-10-20 06:20:37,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:37,793 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-10-20 06:20:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-20 06:20:37,795 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 [2021-10-20 06:20:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:37,796 INFO L225 Difference]: With dead ends: 107 [2021-10-20 06:20:37,796 INFO L226 Difference]: Without dead ends: 107 [2021-10-20 06:20:37,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2147.4ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-10-20 06:20:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-20 06:20:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 61. [2021-10-20 06:20:37,798 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) [2021-10-20 06:20:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-10-20 06:20:37,799 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 24 [2021-10-20 06:20:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:37,799 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-10-20 06:20:37,800 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) [2021-10-20 06:20:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-10-20 06:20:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-20 06:20:37,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:37,801 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] [2021-10-20 06:20:37,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:38,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:38,021 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:20:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1565587052, now seen corresponding path program 1 times [2021-10-20 06:20:38,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:38,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594504777] [2021-10-20 06:20:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:38,022 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:38,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:38,023 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:38,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-20 06:20:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:38,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-20 06:20:38,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:38,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:38,615 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-20 06:20:38,616 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 [2021-10-20 06:20:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:38,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:38,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594504777] [2021-10-20 06:20:38,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594504777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:38,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:38,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-20 06:20:38,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500449695] [2021-10-20 06:20:38,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-20 06:20:38,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-20 06:20:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:20:38,648 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) [2021-10-20 06:20:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:38,815 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-10-20 06:20:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-20 06:20:38,815 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 [2021-10-20 06:20:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:38,816 INFO L225 Difference]: With dead ends: 66 [2021-10-20 06:20:38,816 INFO L226 Difference]: Without dead ends: 66 [2021-10-20 06:20:38,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-20 06:20:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-20 06:20:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-10-20 06:20:38,818 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) [2021-10-20 06:20:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-10-20 06:20:38,818 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 27 [2021-10-20 06:20:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:38,819 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-10-20 06:20:38,819 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) [2021-10-20 06:20:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-10-20 06:20:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-20 06:20:38,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:38,820 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] [2021-10-20 06:20:38,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:39,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:39,026 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 25 more)] === [2021-10-20 06:20:39,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1565587051, now seen corresponding path program 1 times [2021-10-20 06:20:39,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:39,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912548563] [2021-10-20 06:20:39,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:39,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:39,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:39,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:39,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-20 06:20:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:39,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-20 06:20:39,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:39,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:39,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:39,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:20:39,907 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 [2021-10-20 06:20:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:40,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:40,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912548563] [2021-10-20 06:20:40,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912548563] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:40,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:40,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-20 06:20:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837110685] [2021-10-20 06:20:40,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-20 06:20:40,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:40,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-20 06:20:40,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-20 06:20:40,601 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) [2021-10-20 06:20:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:41,163 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-10-20 06:20:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-20 06:20:41,164 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 [2021-10-20 06:20:41,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:41,165 INFO L225 Difference]: With dead ends: 59 [2021-10-20 06:20:41,165 INFO L226 Difference]: Without dead ends: 59 [2021-10-20 06:20:41,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 623.4ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-20 06:20:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-20 06:20:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-20 06:20:41,167 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) [2021-10-20 06:20:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-10-20 06:20:41,167 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 27 [2021-10-20 06:20:41,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:41,168 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-10-20 06:20:41,168 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) [2021-10-20 06:20:41,168 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-10-20 06:20:41,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-20 06:20:41,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:41,169 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] [2021-10-20 06:20:41,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:41,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:41,379 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)] === [2021-10-20 06:20:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:41,379 INFO L82 PathProgramCache]: Analyzing trace with hash 239500490, now seen corresponding path program 1 times [2021-10-20 06:20:41,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:41,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201249578] [2021-10-20 06:20:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:41,380 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:41,381 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:41,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-20 06:20:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:41,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-20 06:20:41,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:42,033 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 [2021-10-20 06:20:42,042 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 [2021-10-20 06:20:42,151 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 [2021-10-20 06:20:42,155 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 [2021-10-20 06:20:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:42,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:42,497 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 [2021-10-20 06:20:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:42,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:20:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:42,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:42,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201249578] [2021-10-20 06:20:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201249578] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:42,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:42,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 10] imperfect sequences [] total 16 [2021-10-20 06:20:42,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859554068] [2021-10-20 06:20:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-20 06:20:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:42,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-20 06:20:42,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-10-20 06:20:42,741 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) [2021-10-20 06:20:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:43,697 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-20 06:20:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-20 06:20:43,698 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 [2021-10-20 06:20:43,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:43,699 INFO L225 Difference]: With dead ends: 53 [2021-10-20 06:20:43,699 INFO L226 Difference]: Without dead ends: 53 [2021-10-20 06:20:43,699 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 986.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-10-20 06:20:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-20 06:20:43,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-20 06:20:43,701 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) [2021-10-20 06:20:43,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-10-20 06:20:43,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 32 [2021-10-20 06:20:43,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:43,702 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-10-20 06:20:43,703 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) [2021-10-20 06:20:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-10-20 06:20:43,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-20 06:20:43,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:43,704 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] [2021-10-20 06:20:43,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:43,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:43,919 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)] === [2021-10-20 06:20:43,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:43,919 INFO L82 PathProgramCache]: Analyzing trace with hash 239500747, now seen corresponding path program 1 times [2021-10-20 06:20:43,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:43,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449336942] [2021-10-20 06:20:43,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:43,920 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:43,921 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:43,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-20 06:20:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:20:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:44,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:44,666 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:44,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449336942] [2021-10-20 06:20:44,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449336942] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:44,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:44,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:20:44,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034191727] [2021-10-20 06:20:44,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:20:44,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:20:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:20:44,668 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) [2021-10-20 06:20:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:44,730 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-20 06:20:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:20:44,731 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 [2021-10-20 06:20:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:44,732 INFO L225 Difference]: With dead ends: 52 [2021-10-20 06:20:44,732 INFO L226 Difference]: Without dead ends: 52 [2021-10-20 06:20:44,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:20:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-20 06:20:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-20 06:20:44,734 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) [2021-10-20 06:20:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-10-20 06:20:44,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 32 [2021-10-20 06:20:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:44,735 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-10-20 06:20:44,735 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) [2021-10-20 06:20:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-10-20 06:20:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-20 06:20:44,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:44,735 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] [2021-10-20 06:20:44,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:44,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:44,947 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)] === [2021-10-20 06:20:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1165411295, now seen corresponding path program 1 times [2021-10-20 06:20:44,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:44,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719210955] [2021-10-20 06:20:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:44,948 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:44,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:44,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:44,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-20 06:20:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-20 06:20:45,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:46,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:46,309 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:46,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719210955] [2021-10-20 06:20:46,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719210955] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:46,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:46,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-10-20 06:20:46,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381660341] [2021-10-20 06:20:46,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-20 06:20:46,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:46,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-20 06:20:46,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-20 06:20:46,311 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) [2021-10-20 06:20:46,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:46,504 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-10-20 06:20:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:20:46,505 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 [2021-10-20 06:20:46,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:46,506 INFO L225 Difference]: With dead ends: 51 [2021-10-20 06:20:46,506 INFO L226 Difference]: Without dead ends: 51 [2021-10-20 06:20:46,506 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-20 06:20:46,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-20 06:20:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-20 06:20:46,508 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) [2021-10-20 06:20:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-20 06:20:46,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 33 [2021-10-20 06:20:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:46,509 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-20 06:20:46,509 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) [2021-10-20 06:20:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-20 06:20:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-20 06:20:46,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:46,510 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] [2021-10-20 06:20:46,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:46,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:46,728 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)] === [2021-10-20 06:20:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1768011635, now seen corresponding path program 1 times [2021-10-20 06:20:46,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:46,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [785289890] [2021-10-20 06:20:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:46,729 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:46,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:46,729 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:46,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-10-20 06:20:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:47,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-20 06:20:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:47,220 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 [2021-10-20 06:20:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:47,419 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:47,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [785289890] [2021-10-20 06:20:47,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [785289890] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:47,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:47,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-20 06:20:47,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649667715] [2021-10-20 06:20:47,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:20:47,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:20:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:20:47,420 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) [2021-10-20 06:20:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:20:47,535 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-20 06:20:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 06:20:47,536 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 [2021-10-20 06:20:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:20:47,536 INFO L225 Difference]: With dead ends: 63 [2021-10-20 06:20:47,536 INFO L226 Difference]: Without dead ends: 63 [2021-10-20 06:20:47,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:20:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-20 06:20:47,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2021-10-20 06:20:47,538 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) [2021-10-20 06:20:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-10-20 06:20:47,538 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 34 [2021-10-20 06:20:47,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:20:47,539 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-10-20 06:20:47,543 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) [2021-10-20 06:20:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-10-20 06:20:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-20 06:20:47,544 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:20:47,544 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] [2021-10-20 06:20:47,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-10-20 06:20:47,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:20:47,744 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)] === [2021-10-20 06:20:47,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:20:47,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1650523386, now seen corresponding path program 1 times [2021-10-20 06:20:47,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:20:47,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668678125] [2021-10-20 06:20:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:20:47,745 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:20:47,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:20:47,746 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:20:47,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-20 06:20:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:20:48,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-20 06:20:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:20:48,302 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 [2021-10-20 06:20:48,368 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-20 06:20:48,368 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 [2021-10-20 06:20:48,976 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-20 06:20:48,977 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 [2021-10-20 06:20:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:49,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:20:51,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:20:51,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:20:51,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668678125] [2021-10-20 06:20:51,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668678125] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:20:51,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:20:51,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-10-20 06:20:51,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802528299] [2021-10-20 06:20:51,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-20 06:20:51,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:20:51,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-20 06:20:51,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=63, Unknown=1, NotChecked=0, Total=90 [2021-10-20 06:20:51,416 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) [2021-10-20 06:21:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:21:19,972 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-10-20 06:21:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-20 06:21:19,973 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 [2021-10-20 06:21:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:21:19,973 INFO L225 Difference]: With dead ends: 65 [2021-10-20 06:21:19,974 INFO L226 Difference]: Without dead ends: 65 [2021-10-20 06:21:19,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 12390.2ms TimeCoverageRelationStatistics Valid=61, Invalid=147, Unknown=2, NotChecked=0, Total=210 [2021-10-20 06:21:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-20 06:21:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2021-10-20 06:21:19,976 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) [2021-10-20 06:21:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-10-20 06:21:19,976 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 37 [2021-10-20 06:21:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:21:19,976 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-10-20 06:21:19,977 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) [2021-10-20 06:21:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-10-20 06:21:19,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-20 06:21:19,977 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:21:19,977 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] [2021-10-20 06:21:19,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-20 06:21:20,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:21:20,178 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)] === [2021-10-20 06:21:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:21:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1956436716, now seen corresponding path program 1 times [2021-10-20 06:21:20,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:21:20,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722849555] [2021-10-20 06:21:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:21:20,180 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:21:20,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:21:20,182 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:21:20,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-20 06:21:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:21:20,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-20 06:21:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:21:20,789 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 [2021-10-20 06:21:20,824 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-20 06:21:20,825 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 [2021-10-20 06:21:20,923 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-20 06:21:20,923 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 [2021-10-20 06:21:21,480 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-10-20 06:21:21,481 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 [2021-10-20 06:21:21,702 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-20 06:21:21,703 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 [2021-10-20 06:21:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:21:28,584 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-20 06:21:28,584 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 [2021-10-20 06:21:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:21:28,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:21:28,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722849555] [2021-10-20 06:21:28,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722849555] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:21:28,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:21:28,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 16 [2021-10-20 06:21:28,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659011562] [2021-10-20 06:21:28,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-20 06:21:28,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:21:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-20 06:21:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=200, Unknown=3, NotChecked=0, Total=272 [2021-10-20 06:21:28,627 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) [2021-10-20 06:22:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:22:17,519 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-10-20 06:22:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-20 06:22:17,520 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 [2021-10-20 06:22:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:22:17,521 INFO L225 Difference]: With dead ends: 69 [2021-10-20 06:22:17,521 INFO L226 Difference]: Without dead ends: 69 [2021-10-20 06:22:17,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 16930.8ms TimeCoverageRelationStatistics Valid=158, Invalid=438, Unknown=4, NotChecked=0, Total=600 [2021-10-20 06:22:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-20 06:22:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2021-10-20 06:22:17,523 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) [2021-10-20 06:22:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-20 06:22:17,523 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 40 [2021-10-20 06:22:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:22:17,524 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-20 06:22:17,524 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) [2021-10-20 06:22:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-20 06:22:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-20 06:22:17,525 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:22:17,525 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] [2021-10-20 06:22:17,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-10-20 06:22:17,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:22:17,741 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)] === [2021-10-20 06:22:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:22:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -519995891, now seen corresponding path program 1 times [2021-10-20 06:22:17,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:22:17,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412380967] [2021-10-20 06:22:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:22:17,742 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:22:17,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:22:17,742 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:22:17,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-20 06:22:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:22:18,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-20 06:22:18,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:22:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:22:23,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:22:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:22:41,568 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-20 06:22:41,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412380967] [2021-10-20 06:22:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412380967] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-20 06:22:41,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:22:41,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2021-10-20 06:22:41,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143375489] [2021-10-20 06:22:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-20 06:22:41,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-20 06:22:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-20 06:22:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=353, Unknown=9, NotChecked=0, Total=420 [2021-10-20 06:22:41,570 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) [2021-10-20 06:23:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:23:00,417 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-10-20 06:23:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-20 06:23:00,417 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 [2021-10-20 06:23:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:23:00,418 INFO L225 Difference]: With dead ends: 68 [2021-10-20 06:23:00,418 INFO L226 Difference]: Without dead ends: 43 [2021-10-20 06:23:00,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 25862.8ms TimeCoverageRelationStatistics Valid=109, Invalid=582, Unknown=11, NotChecked=0, Total=702 [2021-10-20 06:23:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-20 06:23:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-20 06:23:00,420 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) [2021-10-20 06:23:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 42 transitions. [2021-10-20 06:23:00,420 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 42 transitions. Word has length 41 [2021-10-20 06:23:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:23:00,421 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 42 transitions. [2021-10-20 06:23:00,421 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) [2021-10-20 06:23:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 42 transitions. [2021-10-20 06:23:00,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-20 06:23:00,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:23:00,422 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] [2021-10-20 06:23:00,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-20 06:23:00,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:23:00,637 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)] === [2021-10-20 06:23:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:23:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash 430545156, now seen corresponding path program 1 times [2021-10-20 06:23:00,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-20 06:23:00,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019943299] [2021-10-20 06:23:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:23:00,638 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-20 06:23:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat [2021-10-20 06:23:00,639 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-20 06:23:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-20 06:23:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:23:01,384 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 06:23:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 06:23:01,650 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-20 06:23:01,650 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 06:23:01,651 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK [2021-10-20 06:23:01,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-20 06:23:01,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-20 06:23:01,653 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-20 06:23:01,654 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-20 06:23:01,655 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-20 06:23:01,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-20 06:23:01,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,656 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,657 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,658 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-20 06:23:01,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-20 06:23:01,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/mathsat -unsat_core_generation=3 [2021-10-20 06:23:01,876 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:23:01,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:23:01 BoogieIcfgContainer [2021-10-20 06:23:01,940 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:23:01,944 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:23:01,945 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:23:01,945 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:23:01,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:15:31" (3/4) ... [2021-10-20 06:23:01,948 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-20 06:23:01,948 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:23:01,949 INFO L168 Benchmark]: Toolchain (without parser) took 451788.08 ms. Allocated memory was 58.7 MB in the beginning and 100.7 MB in the end (delta: 41.9 MB). Free memory was 36.3 MB in the beginning and 56.3 MB in the end (delta: -20.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,950 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:23:01,950 INFO L168 Benchmark]: CACSL2BoogieTranslator took 894.96 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 36.1 MB in the beginning and 61.6 MB in the end (delta: -25.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,950 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.93 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 59.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,951 INFO L168 Benchmark]: Boogie Preprocessor took 60.50 ms. Allocated memory is still 83.9 MB. Free memory was 59.1 MB in the beginning and 57.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,951 INFO L168 Benchmark]: RCFGBuilder took 751.27 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 39.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,951 INFO L168 Benchmark]: TraceAbstraction took 449958.90 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 38.6 MB in the beginning and 56.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:23:01,952 INFO L168 Benchmark]: Witness Printer took 4.08 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:23:01,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 894.96 ms. Allocated memory was 58.7 MB in the beginning and 83.9 MB in the end (delta: 25.2 MB). Free memory was 36.1 MB in the beginning and 61.6 MB in the end (delta: -25.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 104.93 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 59.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.50 ms. Allocated memory is still 83.9 MB. Free memory was 59.1 MB in the beginning and 57.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 751.27 ms. Allocated memory is still 83.9 MB. Free memory was 57.1 MB in the beginning and 39.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 449958.90 ms. Allocated memory was 83.9 MB in the beginning and 100.7 MB in the end (delta: 16.8 MB). Free memory was 38.6 MB in the beginning and 56.3 MB in the end (delta: -17.7 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. * Witness Printer took 4.08 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 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: 449826.9ms, OverallIterations: 34, TraceHistogramMax: 1, EmptinessCheckTime: 50.7ms, AutomataDifference: 216919.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1983 SDtfs, 8685 SDslu, 5220 SDs, 0 SdLazy, 6594 SolverSat, 689 SolverUnsat, 44 SolverUnknown, 0 SolverNotchecked, 123821.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1445 GetRequests, 972 SyntacticMatches, 37 SemanticMatches, 436 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 286450.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=126occurred in iteration=5, InterpolantAutomatonStates: 325, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 149.1ms AutomataMinimizationTime, 33 MinimizatonAttempts, 1974 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 337.2ms SsaConstructionTime, 1928.0ms SatisfiabilityAnalysisTime, 215521.9ms 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 [2021-10-20 06:23:02,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01a0ae50-3498-4b2d-9ce1-93c078f99194/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...