./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:54:01,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:54:01,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:54:01,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:54:01,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:54:01,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:54:01,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:54:01,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:54:01,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:54:01,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:54:01,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:54:01,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:54:01,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:54:01,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:54:01,980 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:54:01,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:54:01,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:54:01,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:54:01,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:54:01,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:54:01,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:54:01,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:54:01,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:54:01,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:54:02,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:54:02,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:54:02,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:54:02,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:54:02,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:54:02,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:54:02,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:54:02,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:54:02,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:54:02,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:54:02,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:54:02,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:54:02,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:54:02,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:54:02,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:54:02,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:54:02,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:54:02,020 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:54:02,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:54:02,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:54:02,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:54:02,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:54:02,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:54:02,050 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:54:02,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:54:02,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:54:02,051 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:54:02,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:54:02,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:54:02,052 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:54:02,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:54:02,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:54:02,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:54:02,053 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:54:02,054 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:54:02,054 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:54:02,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:54:02,054 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:54:02,055 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:54:02,055 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:54:02,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:54:02,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:54:02,056 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:54:02,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:54:02,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:54:02,057 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:54:02,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:54:02,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:54:02,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2022-11-20 11:54:02,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:54:02,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:54:02,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:54:02,416 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:54:02,416 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:54:02,418 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-20 11:54:06,397 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:54:06,737 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:54:06,738 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-20 11:54:06,750 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/07f833101/0f66bd1836d94a62b72fed8d943b426b/FLAG010dce704 [2022-11-20 11:54:06,778 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/07f833101/0f66bd1836d94a62b72fed8d943b426b [2022-11-20 11:54:06,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:54:06,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:54:06,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:06,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:54:06,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:54:06,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:06" (1/1) ... [2022-11-20 11:54:06,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434fe282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:06, skipping insertion in model container [2022-11-20 11:54:06,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:06" (1/1) ... [2022-11-20 11:54:06,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:54:06,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:54:07,085 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-20 11:54:07,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:07,117 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-20 11:54:07,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@42b32f27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:07, skipping insertion in model container [2022-11-20 11:54:07,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:07,119 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 11:54:07,121 INFO L158 Benchmark]: Toolchain (without parser) took 336.08ms. Allocated memory is still 188.7MB. Free memory was 143.7MB in the beginning and 133.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 11:54:07,122 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory was 74.3MB in the beginning and 74.2MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 11:54:07,123 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.40ms. Allocated memory is still 188.7MB. Free memory was 143.0MB in the beginning and 133.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 11:54:07,125 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 130.0MB. Free memory was 74.3MB in the beginning and 74.2MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.40ms. Allocated memory is still 188.7MB. Free memory was 143.0MB in the beginning and 133.3MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:54:10,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:54:10,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:54:10,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:54:10,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:54:10,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:54:10,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:54:10,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:54:10,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:54:10,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:54:10,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:54:10,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:54:10,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:54:10,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:54:10,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:54:10,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:54:10,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:54:10,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:54:10,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:54:10,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:54:10,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:54:10,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:54:10,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:54:10,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:54:10,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:54:10,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:54:10,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:54:10,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:54:10,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:54:10,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:54:10,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:54:10,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:54:10,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:54:10,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:54:10,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:54:10,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:54:10,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:54:10,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:54:10,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:54:10,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:54:10,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:54:10,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-20 11:54:10,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:54:10,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:54:10,281 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:54:10,281 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:54:10,282 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:54:10,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:54:10,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:54:10,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:54:10,285 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:54:10,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:54:10,286 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:54:10,287 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:54:10,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:54:10,288 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:54:10,288 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:54:10,288 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:54:10,289 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:54:10,289 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:54:10,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:54:10,290 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:54:10,290 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 11:54:10,290 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 11:54:10,291 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:54:10,291 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:54:10,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:54:10,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:54:10,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:54:10,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:54:10,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:54:10,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:54:10,294 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-20 11:54:10,294 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 11:54:10,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 11:54:10,295 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_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675e4a71573eb5ca191c78078c954ea41743d39a46f0fa586376ee48e7dc4190 [2022-11-20 11:54:10,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:54:10,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:54:10,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:54:10,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:54:10,833 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:54:10,835 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-20 11:54:14,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:54:14,992 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:54:14,998 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2022-11-20 11:54:15,018 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/5569d633a/20a9338710a94a5293ffa49890795ddf/FLAG26908f98a [2022-11-20 11:54:15,053 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/data/5569d633a/20a9338710a94a5293ffa49890795ddf [2022-11-20 11:54:15,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:54:15,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:54:15,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:15,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:54:15,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:54:15,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ca14da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15, skipping insertion in model container [2022-11-20 11:54:15,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:54:15,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:54:15,436 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-20 11:54:15,450 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:15,466 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 11:54:15,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:54:15,495 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-20 11:54:15,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:15,507 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:54:15,543 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c[4351,4364] [2022-11-20 11:54:15,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:54:15,570 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:54:15,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15 WrapperNode [2022-11-20 11:54:15,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:54:15,572 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:54:15,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:54:15,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:54:15,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,599 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,658 INFO L138 Inliner]: procedures = 29, calls = 87, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 340 [2022-11-20 11:54:15,658 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:54:15,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:54:15,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:54:15,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:54:15,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,679 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,680 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,706 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:54:15,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:54:15,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:54:15,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:54:15,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (1/1) ... [2022-11-20 11:54:15,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:54:15,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:54:15,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:54:15,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:54:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:54:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 11:54:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:54:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 11:54:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 11:54:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 11:54:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 11:54:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 11:54:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 11:54:15,864 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 11:54:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 11:54:15,865 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 11:54:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 11:54:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 11:54:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:54:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:54:15,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:54:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:54:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 11:54:15,869 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:54:16,062 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:54:16,065 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:54:17,360 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:54:17,809 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:54:17,810 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-20 11:54:17,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:17 BoogieIcfgContainer [2022-11-20 11:54:17,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:54:17,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:54:17,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:54:17,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:54:17,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:54:15" (1/3) ... [2022-11-20 11:54:17,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb2f058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:17, skipping insertion in model container [2022-11-20 11:54:17,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:15" (2/3) ... [2022-11-20 11:54:17,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb2f058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:17, skipping insertion in model container [2022-11-20 11:54:17,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:17" (3/3) ... [2022-11-20 11:54:17,829 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2022-11-20 11:54:17,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:54:17,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-20 11:54:17,854 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:54:18,044 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 11:54:18,109 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:54:18,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 290 places, 299 transitions, 630 flow [2022-11-20 11:54:18,144 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 290 places, 299 transitions, 630 flow [2022-11-20 11:54:18,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 299 transitions, 630 flow [2022-11-20 11:54:18,317 INFO L130 PetriNetUnfolder]: 22/295 cut-off events. [2022-11-20 11:54:18,317 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 11:54:18,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312 conditions, 295 events. 22/295 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 282 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 243. Up to 2 conditions per place. [2022-11-20 11:54:18,329 INFO L119 LiptonReduction]: Number of co-enabled transitions 4104 [2022-11-20 11:55:16,507 WARN L233 SmtUtils]: Spent 7.70s on a formula simplification. DAG size of input: 154 DAG size of output: 153 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 11:55:19,345 INFO L134 LiptonReduction]: Checked pairs total: 9014 [2022-11-20 11:55:19,345 INFO L136 LiptonReduction]: Total number of compositions: 309 [2022-11-20 11:55:19,354 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 87 places, 81 transitions, 194 flow [2022-11-20 11:55:20,473 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15416 states, 14022 states have (on average 4.96954785337327) internal successors, (69683), 15415 states have internal predecessors, (69683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:20,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:55:20,530 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17edc9ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:55:20,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2022-11-20 11:55:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand has 15416 states, 14022 states have (on average 4.96954785337327) internal successors, (69683), 15415 states have internal predecessors, (69683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:20,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:55:20,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:20,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:55:20,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-20 11:55:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:20,630 INFO L85 PathProgramCache]: Analyzing trace with hash 46624, now seen corresponding path program 1 times [2022-11-20 11:55:20,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:20,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972844102] [2022-11-20 11:55:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:20,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:20,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:55:20,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-20 11:55:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:55:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:21,445 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:55:21,496 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:55:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:21,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:21,563 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:21,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972844102] [2022-11-20 11:55:21,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972844102] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:21,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:21,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:55:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122501110] [2022-11-20 11:55:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:21,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:21,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:21,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:21,628 INFO L87 Difference]: Start difference. First operand has 15416 states, 14022 states have (on average 4.96954785337327) internal successors, (69683), 15415 states have internal predecessors, (69683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:23,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:23,466 INFO L93 Difference]: Finished difference Result 24746 states and 111712 transitions. [2022-11-20 11:55:23,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 11:55:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:24,108 INFO L225 Difference]: With dead ends: 24746 [2022-11-20 11:55:24,125 INFO L226 Difference]: Without dead ends: 24746 [2022-11-20 11:55:24,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:24,134 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:24,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 12 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:55:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24746 states. [2022-11-20 11:55:25,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24746 to 12378. [2022-11-20 11:55:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12378 states, 11371 states have (on average 4.913288189253364) internal successors, (55869), 12377 states have internal predecessors, (55869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12378 states to 12378 states and 55869 transitions. [2022-11-20 11:55:25,971 INFO L78 Accepts]: Start accepts. Automaton has 12378 states and 55869 transitions. Word has length 2 [2022-11-20 11:55:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:25,971 INFO L495 AbstractCegarLoop]: Abstraction has 12378 states and 55869 transitions. [2022-11-20 11:55:25,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:25,972 INFO L276 IsEmpty]: Start isEmpty. Operand 12378 states and 55869 transitions. [2022-11-20 11:55:25,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 11:55:25,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:25,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 11:55:25,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 11:55:26,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:26,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-20 11:55:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 46626, now seen corresponding path program 1 times [2022-11-20 11:55:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:26,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987778459] [2022-11-20 11:55:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:26,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:26,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:26,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:55:26,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-20 11:55:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:26,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:55:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:26,548 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 11:55:26,548 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 11:55:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:26,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:55:26,591 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:26,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987778459] [2022-11-20 11:55:26,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987778459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:55:26,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:55:26,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:55:26,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111289998] [2022-11-20 11:55:26,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:55:26,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:55:26,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:55:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:26,597 INFO L87 Difference]: Start difference. First operand 12378 states and 55869 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:27,498 INFO L93 Difference]: Finished difference Result 12375 states and 55863 transitions. [2022-11-20 11:55:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:55:27,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-20 11:55:27,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:27,756 INFO L225 Difference]: With dead ends: 12375 [2022-11-20 11:55:27,757 INFO L226 Difference]: Without dead ends: 12375 [2022-11-20 11:55:27,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:55:27,759 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:27,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 6 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:55:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12375 states. [2022-11-20 11:55:28,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12375 to 12375. [2022-11-20 11:55:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12375 states, 11371 states have (on average 4.912760531175798) internal successors, (55863), 12374 states have internal predecessors, (55863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12375 states to 12375 states and 55863 transitions. [2022-11-20 11:55:28,722 INFO L78 Accepts]: Start accepts. Automaton has 12375 states and 55863 transitions. Word has length 2 [2022-11-20 11:55:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:28,723 INFO L495 AbstractCegarLoop]: Abstraction has 12375 states and 55863 transitions. [2022-11-20 11:55:28,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 12375 states and 55863 transitions. [2022-11-20 11:55:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:55:28,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:28,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:55:28,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-20 11:55:28,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:28,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-20 11:55:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1453373, now seen corresponding path program 1 times [2022-11-20 11:55:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298328009] [2022-11-20 11:55:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:28,939 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:28,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:28,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:55:28,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-20 11:55:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:55:29,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:29,357 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 11:55:29,358 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 11:55:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:29,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:55:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:55:29,754 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-20 11:55:29,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298328009] [2022-11-20 11:55:29,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298328009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:55:29,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:55:29,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-20 11:55:29,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348912530] [2022-11-20 11:55:29,755 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:55:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:55:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-20 11:55:29,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:55:29,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:55:29,756 INFO L87 Difference]: Start difference. First operand 12375 states and 55863 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:55:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:55:33,711 INFO L93 Difference]: Finished difference Result 37114 states and 167573 transitions. [2022-11-20 11:55:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:55:33,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-20 11:55:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:55:34,159 INFO L225 Difference]: With dead ends: 37114 [2022-11-20 11:55:34,159 INFO L226 Difference]: Without dead ends: 37114 [2022-11-20 11:55:34,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:55:34,170 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 369 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:55:34,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 24 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-20 11:55:34,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37114 states. [2022-11-20 11:55:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37114 to 12384. [2022-11-20 11:55:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12384 states, 11380 states have (on average 4.910984182776802) internal successors, (55887), 12383 states have internal predecessors, (55887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:55:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12384 states to 12384 states and 55887 transitions. [2022-11-20 11:55:35,561 INFO L78 Accepts]: Start accepts. Automaton has 12384 states and 55887 transitions. Word has length 3 [2022-11-20 11:55:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:55:35,561 INFO L495 AbstractCegarLoop]: Abstraction has 12384 states and 55887 transitions. [2022-11-20 11:55:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-20 11:55:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 12384 states and 55887 transitions. [2022-11-20 11:55:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:55:35,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:55:35,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:55:35,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:55:35,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:35,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2022-11-20 11:55:35,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:55:35,778 INFO L85 PathProgramCache]: Analyzing trace with hash 45128206, now seen corresponding path program 1 times [2022-11-20 11:55:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-20 11:55:35,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582973706] [2022-11-20 11:55:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:55:35,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 11:55:35,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat [2022-11-20 11:55:35,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 11:55:35,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_23c9f3fa-dca2-47b4-9cc6-4ef8eff9c30d/bin/uautomizer-ug76WZFUDN/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-20 11:55:36,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:55:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:55:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:55:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:55:36,486 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 11:55:36,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 11:55:37,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:55:37,635 INFO L321 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-20 11:55:37,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 52 [2022-11-20 11:55:39,266 INFO L321 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2022-11-20 11:55:39,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 182