./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:53:57,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:53:57,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:53:57,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:53:57,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:53:57,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:53:57,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:53:57,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:53:57,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:53:57,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:53:57,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:53:57,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:53:57,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:53:57,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:53:57,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:53:57,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:53:57,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:53:57,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:53:57,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:53:57,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:53:57,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:53:57,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:53:57,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:53:57,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:53:57,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:53:57,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:53:57,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:53:57,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:53:57,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:53:57,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:53:57,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:53:57,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:53:57,867 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:53:57,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:53:57,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:53:57,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:53:57,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:53:57,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:53:57,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:53:57,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:53:57,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:53:57,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:53:57,920 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:53:57,920 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:53:57,922 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:53:57,922 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:53:57,922 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:53:57,923 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:53:57,923 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:53:57,923 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:53:57,923 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:53:57,923 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:53:57,925 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:53:57,925 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:53:57,925 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:53:57,925 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:53:57,926 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:53:57,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:53:57,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:53:57,927 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:53:57,927 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:53:57,928 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:53:57,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:53:57,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:53:57,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:53:57,928 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:53:57,929 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:53:57,929 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:53:57,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:53:57,931 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:53:57,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:53:57,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:53:57,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:53:57,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:53:57,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:53:57,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:53:57,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:53:57,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:53:57,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:53:57,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:53:57,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:53:57,934 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_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-03 04:53:58,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:53:58,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:53:58,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:53:58,234 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:53:58,235 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:53:58,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-03 04:53:58,310 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/915920af7/a156a26fc19d43b0abdaead28e6a4577/FLAG2e5117443 [2021-11-03 04:53:58,862 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:53:58,862 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-03 04:53:58,875 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/915920af7/a156a26fc19d43b0abdaead28e6a4577/FLAG2e5117443 [2021-11-03 04:53:59,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/915920af7/a156a26fc19d43b0abdaead28e6a4577 [2021-11-03 04:53:59,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:53:59,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:53:59,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:53:59,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:53:59,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:53:59,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:53:59" (1/1) ... [2021-11-03 04:53:59,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a98bf0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:53:59, skipping insertion in model container [2021-11-03 04:53:59,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:53:59" (1/1) ... [2021-11-03 04:53:59,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:53:59,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:53:59,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:53:59,524 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 04:53:59,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3787a50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:53:59, skipping insertion in model container [2021-11-03 04:53:59,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:53:59,525 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:53:59,527 INFO L168 Benchmark]: Toolchain (without parser) took 364.26 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 61.3 MB in the beginning and 82.0 MB in the end (delta: -20.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:53:59,532 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory was 61.7 MB in the beginning and 61.7 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:53:59,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.03 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 61.1 MB in the beginning and 82.0 MB in the end (delta: -20.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:53:59,537 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 83.9 MB. Free memory was 61.7 MB in the beginning and 61.7 MB in the end (delta: 63.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.03 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 61.1 MB in the beginning and 82.0 MB in the end (delta: -20.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 535]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:54:01,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:54:01,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:54:01,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:54:01,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:54:01,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:54:01,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:54:01,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:54:01,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:54:01,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:54:01,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:54:01,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:54:01,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:54:01,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:54:01,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:54:01,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:54:01,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:54:01,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:54:01,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:54:01,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:54:01,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:54:02,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:54:02,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:54:02,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:54:02,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:54:02,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:54:02,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:54:02,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:54:02,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:54:02,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:54:02,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:54:02,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:54:02,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:54:02,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:54:02,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:54:02,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:54:02,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:54:02,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:54:02,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:54:02,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:54:02,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:54:02,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:54:02,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:54:02,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:54:02,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:54:02,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:54:02,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:54:02,077 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:54:02,077 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:54:02,078 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:54:02,078 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:54:02,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:54:02,081 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:54:02,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:54:02,082 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:54:02,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:54:02,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:54:02,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:54:02,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:54:02,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:54:02,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:54:02,083 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:54:02,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:54:02,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:54:02,084 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:54:02,084 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:54:02,084 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:54:02,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:54:02,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:54:02,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:54:02,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:54:02,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:54:02,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:54:02,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:54:02,087 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:54:02,087 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:02,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:54:02,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:54:02,088 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_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00a8f866e26c2e2f6efeb25e7ec6952d97cdca88cd5ba8f7afdfeeef8678b95c [2021-11-03 04:54:02,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:54:02,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:54:02,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:54:02,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:54:02,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:54:02,547 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-03 04:54:02,625 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/de853d8c5/57ecddd83d37482e996dc1b8d470bc32/FLAG0e075af28 [2021-11-03 04:54:03,192 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:54:03,193 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/sv-benchmarks/c/array-memsafety/array03-alloca-2.i [2021-11-03 04:54:03,218 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/de853d8c5/57ecddd83d37482e996dc1b8d470bc32/FLAG0e075af28 [2021-11-03 04:54:03,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/data/de853d8c5/57ecddd83d37482e996dc1b8d470bc32 [2021-11-03 04:54:03,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:54:03,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:54:03,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:54:03,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:54:03,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:54:03,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:54:03" (1/1) ... [2021-11-03 04:54:03,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d4cf992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:03, skipping insertion in model container [2021-11-03 04:54:03,490 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:54:03" (1/1) ... [2021-11-03 04:54:03,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:54:03,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:54:03,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:54:03,874 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:54:03,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:54:03,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:54:03,958 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:54:04,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:54:04,061 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:54:04,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04 WrapperNode [2021-11-03 04:54:04,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:54:04,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:54:04,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:54:04,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:54:04,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:54:04,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:54:04,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:54:04,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:54:04,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,182 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:54:04,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:54:04,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:54:04,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:54:04,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (1/1) ... [2021-11-03 04:54:04,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:54:04,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:04,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:54:04,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:54:04,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:54:04,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:54:04,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:54:04,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:54:04,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:54:04,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:54:04,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:54:04,896 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:54:04,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:54:04 BoogieIcfgContainer [2021-11-03 04:54:04,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:54:04,900 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:54:04,900 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:54:04,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:54:04,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:54:03" (1/3) ... [2021-11-03 04:54:04,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bbe86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:54:04, skipping insertion in model container [2021-11-03 04:54:04,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:54:04" (2/3) ... [2021-11-03 04:54:04,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27bbe86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:54:04, skipping insertion in model container [2021-11-03 04:54:04,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:54:04" (3/3) ... [2021-11-03 04:54:04,906 INFO L111 eAbstractionObserver]: Analyzing ICFG array03-alloca-2.i [2021-11-03 04:54:04,911 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:54:04,911 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2021-11-03 04:54:04,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:54:04,960 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:54:04,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2021-11-03 04:54:04,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:54:04,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:05,000 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:54:05,000 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-03 04:54:05,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:05,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135433204] [2021-11-03 04:54:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:05,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:05,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:05,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:54:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:05,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:54:05,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:05,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:54:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:05,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:05,305 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:05,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135433204] [2021-11-03 04:54:05,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135433204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:05,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:05,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:54:05,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514849351] [2021-11-03 04:54:05,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:54:05,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:54:05,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:54:05,333 INFO L87 Difference]: Start difference. First operand has 45 states, 27 states have (on average 1.962962962962963) internal successors, (53), 44 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) 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) [2021-11-03 04:54:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:05,490 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-11-03 04:54:05,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:54:05,493 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 [2021-11-03 04:54:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:05,503 INFO L225 Difference]: With dead ends: 44 [2021-11-03 04:54:05,503 INFO L226 Difference]: Without dead ends: 42 [2021-11-03 04:54:05,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:54:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-03 04:54:05,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-03 04:54:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 41 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) [2021-11-03 04:54:05,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-11-03 04:54:05,540 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-11-03 04:54:05,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:05,541 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-11-03 04:54:05,541 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) [2021-11-03 04:54:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-11-03 04:54:05,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:54:05,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:05,542 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:54:05,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:05,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:05,760 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:05,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:05,761 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-03 04:54:05,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:05,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116128108] [2021-11-03 04:54:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:05,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:05,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:05,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:54:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:54:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:05,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:54:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:05,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:06,167 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:06,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116128108] [2021-11-03 04:54:06,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116128108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:06,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:54:06,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722903190] [2021-11-03 04:54:06,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:54:06,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:06,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:54:06,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:54:06,171 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:07,168 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2021-11-03 04:54:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:54:07,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-11-03 04:54:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:07,176 INFO L225 Difference]: With dead ends: 120 [2021-11-03 04:54:07,178 INFO L226 Difference]: Without dead ends: 120 [2021-11-03 04:54:07,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:54:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-03 04:54:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 46. [2021-11-03 04:54:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 45 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) [2021-11-03 04:54:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-03 04:54:07,198 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 6 [2021-11-03 04:54:07,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:07,199 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-03 04:54:07,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:07,199 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-03 04:54:07,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:54:07,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:07,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:07,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:07,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:07,418 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:07,419 INFO L85 PathProgramCache]: Analyzing trace with hash 176742579, now seen corresponding path program 1 times [2021-11-03 04:54:07,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:07,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757726921] [2021-11-03 04:54:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:07,420 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:07,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:07,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:07,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:54:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:07,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:07,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:07,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:54:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:07,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:07,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:07,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757726921] [2021-11-03 04:54:07,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757726921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:07,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:07,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:54:07,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755542966] [2021-11-03 04:54:07,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:54:07,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:54:07,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:54:07,617 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:07,789 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-11-03 04:54:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:54:07,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 04:54:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:07,791 INFO L225 Difference]: With dead ends: 39 [2021-11-03 04:54:07,791 INFO L226 Difference]: Without dead ends: 39 [2021-11-03 04:54:07,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:54:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-03 04:54:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-03 04:54:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.5) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-03 04:54:07,795 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 8 [2021-11-03 04:54:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:07,796 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-03 04:54:07,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-03 04:54:07,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:54:07,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:07,797 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:07,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:07,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:07,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash 176742580, now seen corresponding path program 1 times [2021-11-03 04:54:07,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:07,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1208603869] [2021-11-03 04:54:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:07,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:07,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:08,000 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:54:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:54:08,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:08,115 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 8 treesize of output 7 [2021-11-03 04:54:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:08,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:08,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:08,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1208603869] [2021-11-03 04:54:08,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1208603869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:08,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:08,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-03 04:54:08,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593633633] [2021-11-03 04:54:08,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:54:08,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:54:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:54:08,580 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-03 04:54:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:09,149 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-11-03 04:54:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:54:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 8 [2021-11-03 04:54:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:09,150 INFO L225 Difference]: With dead ends: 40 [2021-11-03 04:54:09,150 INFO L226 Difference]: Without dead ends: 40 [2021-11-03 04:54:09,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:54:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-03 04:54:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2021-11-03 04:54:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-11-03 04:54:09,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 8 [2021-11-03 04:54:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-11-03 04:54:09,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-11-03 04:54:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-11-03 04:54:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:54:09,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:09,157 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:09,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:54:09,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:09,368 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:09,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:09,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-03 04:54:09,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:09,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6486648] [2021-11-03 04:54:09,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:09,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:09,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:09,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:54:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:54:09,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:09,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:09,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:09,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6486648] [2021-11-03 04:54:09,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6486648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:09,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290073126] [2021-11-03 04:54:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:09,593 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:09,598 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:09,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:54:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:54:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:09,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:09,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:09,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290073126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:09,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582405509] [2021-11-03 04:54:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:09,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:09,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:09,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:54:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:54:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:09,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582405509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:10,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:10,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:54:10,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107182430] [2021-11-03 04:54:10,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:54:10,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:10,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:54:10,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:54:10,034 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-03 04:54:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:10,109 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-03 04:54:10,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:54:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 10 [2021-11-03 04:54:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:10,112 INFO L225 Difference]: With dead ends: 61 [2021-11-03 04:54:10,112 INFO L226 Difference]: Without dead ends: 61 [2021-11-03 04:54:10,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:54:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-03 04:54:10,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 39. [2021-11-03 04:54:10,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:10,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-03 04:54:10,117 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 10 [2021-11-03 04:54:10,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:10,118 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-03 04:54:10,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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) [2021-11-03 04:54:10,118 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-03 04:54:10,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:54:10,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:10,119 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:10,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:10,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-03 04:54:10,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:10,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:10,744 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:10,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-03 04:54:10,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:10,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347914504] [2021-11-03 04:54:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:10,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:10,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:10,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:10,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:54:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:54:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:10,883 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 8 treesize of output 7 [2021-11-03 04:54:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:11,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:11,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:11,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347914504] [2021-11-03 04:54:11,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347914504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:11,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125093130] [2021-11-03 04:54:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:11,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:11,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:11,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:11,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:54:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:54:11,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:11,952 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 8 treesize of output 7 [2021-11-03 04:54:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:12,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125093130] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:12,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854229479] [2021-11-03 04:54:12,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:12,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:12,396 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:12,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:54:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:54:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:12,566 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 8 treesize of output 7 [2021-11-03 04:54:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:12,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:12,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854229479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:12,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:12,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 04:54:12,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541460182] [2021-11-03 04:54:12,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:54:12,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:12,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:54:12,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:54:12,988 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2021-11-03 04:54:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:14,298 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2021-11-03 04:54:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:54:14,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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 10 [2021-11-03 04:54:14,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:14,301 INFO L225 Difference]: With dead ends: 95 [2021-11-03 04:54:14,302 INFO L226 Difference]: Without dead ends: 95 [2021-11-03 04:54:14,302 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:54:14,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-03 04:54:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 51. [2021-11-03 04:54:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-03 04:54:14,307 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 10 [2021-11-03 04:54:14,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:14,308 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-03 04:54:14,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 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) [2021-11-03 04:54:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-03 04:54:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 04:54:14,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:14,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:14,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:14,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:14,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-03 04:54:14,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:14,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 363893485, now seen corresponding path program 1 times [2021-11-03 04:54:14,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:14,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405875674] [2021-11-03 04:54:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:14,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:14,911 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:14,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:54:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:15,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:54:15,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:15,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:15,138 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:15,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405875674] [2021-11-03 04:54:15,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405875674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:15,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:15,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:54:15,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750480259] [2021-11-03 04:54:15,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:54:15,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:15,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:54:15,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:54:15,141 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:15,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:15,308 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-11-03 04:54:15,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:54:15,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 04:54:15,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:15,310 INFO L225 Difference]: With dead ends: 86 [2021-11-03 04:54:15,310 INFO L226 Difference]: Without dead ends: 86 [2021-11-03 04:54:15,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 04:54:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-03 04:54:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-11-03 04:54:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-03 04:54:15,316 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 13 [2021-11-03 04:54:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:15,316 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-03 04:54:15,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-03 04:54:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:54:15,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:15,318 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:15,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:15,520 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1194451038, now seen corresponding path program 1 times [2021-11-03 04:54:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:15,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915775197] [2021-11-03 04:54:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:15,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:15,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:15,521 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:15,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:54:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:54:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:15,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:15,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:15,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915775197] [2021-11-03 04:54:15,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915775197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:15,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1573046564] [2021-11-03 04:54:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:15,887 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:15,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:15,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:54:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:16,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:54:16,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:16,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1573046564] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:16,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121876988] [2021-11-03 04:54:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:16,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:16,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:16,289 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:16,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:54:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:54:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:16,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:16,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:16,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121876988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:16,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:16,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:54:16,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77816756] [2021-11-03 04:54:16,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:54:16,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:16,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:54:16,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:54:16,659 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:16,803 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-03 04:54:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:54:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 19 [2021-11-03 04:54:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:16,805 INFO L225 Difference]: With dead ends: 71 [2021-11-03 04:54:16,805 INFO L226 Difference]: Without dead ends: 71 [2021-11-03 04:54:16,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:54:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-03 04:54:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-11-03 04:54:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-11-03 04:54:16,812 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 19 [2021-11-03 04:54:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:16,812 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-11-03 04:54:16,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-11-03 04:54:16,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 04:54:16,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:16,814 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:16,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:17,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:17,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-03 04:54:17,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:17,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:17,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash -393896864, now seen corresponding path program 1 times [2021-11-03 04:54:17,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:17,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089514837] [2021-11-03 04:54:17,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:17,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:17,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:17,426 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:17,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:54:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:17,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:54:17,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:17,642 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 8 treesize of output 7 [2021-11-03 04:54:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:19,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:19,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089514837] [2021-11-03 04:54:19,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089514837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:19,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740899177] [2021-11-03 04:54:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:19,088 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:19,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:19,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:54:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:19,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:54:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:19,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:20,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740899177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:20,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388676577] [2021-11-03 04:54:20,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:20,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:20,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:20,112 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:20,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:54:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:54:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:20,382 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 8 treesize of output 7 [2021-11-03 04:54:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:20,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:21,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388676577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:21,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:21,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 22 [2021-11-03 04:54:21,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940425339] [2021-11-03 04:54:21,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:54:21,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:21,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:54:21,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:54:21,102 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:23,714 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2021-11-03 04:54:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:54:23,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 04:54:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:23,716 INFO L225 Difference]: With dead ends: 139 [2021-11-03 04:54:23,716 INFO L226 Difference]: Without dead ends: 139 [2021-11-03 04:54:23,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 04:54:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-03 04:54:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2021-11-03 04:54:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 112 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-11-03 04:54:23,727 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 19 [2021-11-03 04:54:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:23,727 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-11-03 04:54:23,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-11-03 04:54:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:54:23,729 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:23,729 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:23,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:24,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:24,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:24,336 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:24,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:24,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1626723800, now seen corresponding path program 1 times [2021-11-03 04:54:24,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:24,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832837260] [2021-11-03 04:54:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:54:24,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:24,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:24,338 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:24,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:54:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:54:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:54:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:24,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:54:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:54:24,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 04:54:27,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:27,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832837260] [2021-11-03 04:54:27,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832837260] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:54:27,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:54:27,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-03 04:54:27,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907295079] [2021-11-03 04:54:27,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:54:27,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:54:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-03 04:54:27,084 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:27,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:27,275 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-11-03 04:54:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:54:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 04:54:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:27,277 INFO L225 Difference]: With dead ends: 112 [2021-11-03 04:54:27,277 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 04:54:27,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-03 04:54:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 04:54:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-03 04:54:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.2) internal successors, (102), 86 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) [2021-11-03 04:54:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-11-03 04:54:27,283 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 20 [2021-11-03 04:54:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:27,283 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-11-03 04:54:27,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:27,283 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-11-03 04:54:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:54:27,284 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:27,284 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 04:54:27,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:27,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:54:27,485 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-03 04:54:27,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:27,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644344237] [2021-11-03 04:54:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:27,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:27,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:27,486 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:27,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:54:27,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:27,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:27,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:54:27,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:27,865 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 8 treesize of output 7 [2021-11-03 04:54:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:28,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:30,471 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:30,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644344237] [2021-11-03 04:54:30,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644344237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:30,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687152019] [2021-11-03 04:54:30,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:30,471 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:30,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:30,480 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:30,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:54:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:30,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:30,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:54:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:31,021 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 8 treesize of output 7 [2021-11-03 04:54:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:31,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:32,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687152019] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:32,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2922069] [2021-11-03 04:54:32,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:32,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:32,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:32,345 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:32,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 04:54:32,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:54:32,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:32,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:54:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:33,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:35,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2922069] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:35,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:35,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 22 [2021-11-03 04:54:35,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271717725] [2021-11-03 04:54:35,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:54:35,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:35,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:54:35,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:54:35,146 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:54:41,719 INFO L93 Difference]: Finished difference Result 559 states and 664 transitions. [2021-11-03 04:54:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:54:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 04:54:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:54:41,724 INFO L225 Difference]: With dead ends: 559 [2021-11-03 04:54:41,724 INFO L226 Difference]: Without dead ends: 559 [2021-11-03 04:54:41,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:54:41,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-03 04:54:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 111. [2021-11-03 04:54:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.2110091743119267) internal successors, (132), 110 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2021-11-03 04:54:41,736 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 22 [2021-11-03 04:54:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:54:41,736 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2021-11-03 04:54:41,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:54:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2021-11-03 04:54:41,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-03 04:54:41,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:54:41,739 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:54:41,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:41,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:42,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:54:42,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:42,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:54:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:54:42,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1185610374, now seen corresponding path program 2 times [2021-11-03 04:54:42,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:54:42,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430277437] [2021-11-03 04:54:42,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:42,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:54:42,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:54:42,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:54:42,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:54:42,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:42,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:54:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:42,847 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 8 treesize of output 7 [2021-11-03 04:54:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:43,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:54:47,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:54:47,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430277437] [2021-11-03 04:54:47,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430277437] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:47,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [755728360] [2021-11-03 04:54:47,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:47,194 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:54:47,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:54:47,195 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:54:47,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:54:47,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:47,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:54:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:54:48,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:54:50,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [755728360] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:50,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912343998] [2021-11-03 04:54:50,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:54:50,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:54:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:54:50,020 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:54:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 04:54:50,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:54:50,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:54:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:54:50,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:54:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:51,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:54:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:54:52,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912343998] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:54:52,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:54:52,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 49 [2021-11-03 04:54:52,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811149270] [2021-11-03 04:54:52,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:54:52,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:54:52,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:54:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 04:54:52,777 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:55:05,873 INFO L93 Difference]: Finished difference Result 190 states and 224 transitions. [2021-11-03 04:55:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:55:05,874 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 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 44 [2021-11-03 04:55:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:55:05,875 INFO L225 Difference]: With dead ends: 190 [2021-11-03 04:55:05,875 INFO L226 Difference]: Without dead ends: 111 [2021-11-03 04:55:05,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=646, Invalid=3776, Unknown=0, NotChecked=0, Total=4422 [2021-11-03 04:55:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-03 04:55:05,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-03 04:55:05,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 109 states have (on average 1.1926605504587156) internal successors, (130), 110 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:05,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2021-11-03 04:55:05,882 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 44 [2021-11-03 04:55:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:55:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2021-11-03 04:55:05,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.877551020408163) internal successors, (190), 49 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:55:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2021-11-03 04:55:05,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:55:05,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:55:05,885 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 04:55:05,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:55:06,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-03 04:55:06,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:55:06,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:55:06,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:55:06,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:55:06,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-03 04:55:06,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:55:06,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833185555] [2021-11-03 04:55:06,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:55:06,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:55:06,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:55:06,490 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:55:06,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:55:07,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:55:07,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:55:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:55:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:07,500 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 8 treesize of output 7 [2021-11-03 04:55:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:08,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:13,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:55:13,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833185555] [2021-11-03 04:55:13,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833185555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:55:13,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518009406] [2021-11-03 04:55:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:55:13,174 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:55:13,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:55:13,175 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:55:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:55:15,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:55:15,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:55:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:55:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:15,605 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 8 treesize of output 7 [2021-11-03 04:55:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:17,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:55:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518009406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:55:34,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722013106] [2021-11-03 04:55:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:55:34,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:55:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:55:34,699 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:55:34,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 04:55:47,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:55:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:55:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:55:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:55:47,733 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 8 treesize of output 7 [2021-11-03 04:55:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:55:49,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:56:02,296 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:56:02,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722013106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:56:02,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:56:02,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 18, 21, 18, 18] total 67 [2021-11-03 04:56:02,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98873709] [2021-11-03 04:56:02,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-03 04:56:02,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:56:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-03 04:56:02,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=3334, Unknown=0, NotChecked=0, Total=4556 [2021-11-03 04:56:02,301 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:57,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:57:57,131 INFO L93 Difference]: Finished difference Result 1247 states and 1482 transitions. [2021-11-03 04:57:57,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:57:57,133 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 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 46 [2021-11-03 04:57:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:57:57,142 INFO L225 Difference]: With dead ends: 1247 [2021-11-03 04:57:57,143 INFO L226 Difference]: Without dead ends: 1247 [2021-11-03 04:57:57,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 207 SyntacticMatches, 4 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3600 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=2582, Invalid=6348, Unknown=0, NotChecked=0, Total=8930 [2021-11-03 04:57:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-03 04:57:57,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 159. [2021-11-03 04:57:57,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 158 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2021-11-03 04:57:57,164 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 46 [2021-11-03 04:57:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:57:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2021-11-03 04:57:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.0) internal successors, (201), 68 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:57:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2021-11-03 04:57:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 04:57:57,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:57:57,167 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:57:57,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:57,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:57,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-03 04:57:57,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:57:57,786 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:57:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:57:57,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1558174208, now seen corresponding path program 3 times [2021-11-03 04:57:57,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:57:57,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780470629] [2021-11-03 04:57:57,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:57:57,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:57:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:57:57,791 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:57:57,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:57:58,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:57:58,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:57:58,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:57:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:57:58,914 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 8 treesize of output 7 [2021-11-03 04:58:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:58:00,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:58:03,355 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:58:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780470629] [2021-11-03 04:58:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780470629] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:58:03,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1578656111] [2021-11-03 04:58:03,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:58:03,355 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:58:03,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:58:03,356 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:58:03,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-03 04:58:05,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:58:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:58:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-03 04:58:05,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:05,119 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 8 treesize of output 7 [2021-11-03 04:58:07,049 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 17 treesize of output 13 [2021-11-03 04:58:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:07,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:58:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1578656111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:58:17,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834089306] [2021-11-03 04:58:17,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:58:17,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:58:17,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:58:17,839 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:58:17,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-03 04:58:19,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:58:19,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:58:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:58:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:58:19,732 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 8 treesize of output 7 [2021-11-03 04:58:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:58:21,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:58:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:58:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834089306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:58:26,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:58:26,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16, 18, 11, 11] total 55 [2021-11-03 04:58:26,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790370129] [2021-11-03 04:58:26,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-03 04:58:26,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:58:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-03 04:58:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2587, Unknown=0, NotChecked=0, Total=2970 [2021-11-03 04:58:26,204 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:16,448 INFO L93 Difference]: Finished difference Result 311 states and 371 transitions. [2021-11-03 04:59:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-03 04:59:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 0 states have call successors, (0), 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 52 [2021-11-03 04:59:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:16,453 INFO L225 Difference]: With dead ends: 311 [2021-11-03 04:59:16,454 INFO L226 Difference]: Without dead ends: 249 [2021-11-03 04:59:16,457 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 55.4s TimeCoverageRelationStatistics Valid=1200, Invalid=5772, Unknown=0, NotChecked=0, Total=6972 [2021-11-03 04:59:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-03 04:59:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2021-11-03 04:59:16,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.2024291497975708) internal successors, (297), 248 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:16,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2021-11-03 04:59:16,465 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 52 [2021-11-03 04:59:16,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:16,465 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2021-11-03 04:59:16,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.9272727272727272) internal successors, (216), 55 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:59:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2021-11-03 04:59:16,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-03 04:59:16,470 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:16,471 INFO L513 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1] [2021-11-03 04:59:16,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:16,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:16,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:17,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:17,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 13 more)] === [2021-11-03 04:59:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:17,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2084926986, now seen corresponding path program 4 times [2021-11-03 04:59:17,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:17,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939952768] [2021-11-03 04:59:17,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:59:17,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:17,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:17,084 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:17,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 04:59:18,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:59:18,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:59:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:59:18,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:18,550 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 8 treesize of output 7 [2021-11-03 04:59:22,608 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:22,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:45,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:45,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939952768] [2021-11-03 04:59:45,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939952768] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:45,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [930366262] [2021-11-03 04:59:45,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:59:45,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:59:45,740 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:59:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 04:59:48,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:59:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:59:48,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:59:48,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:48,469 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 8 treesize of output 7 [2021-11-03 04:59:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:51,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:58,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [930366262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:58,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473062388] [2021-11-03 04:59:58,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:59:58,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:59:58,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:59:58,070 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:59:58,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbb413c-8af0-47f7-99f3-c0c034a504ba/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 05:00:00,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 05:00:00,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:00:00,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-03 05:00:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:00,402 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 8 treesize of output 7 [2021-11-03 05:00:06,699 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:00:06,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:00:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473062388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:51,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:00:51,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29, 29, 39, 39] total 112 [2021-11-03 05:00:51,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140103707] [2021-11-03 05:00:51,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-03 05:00:51,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-03 05:00:51,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3289, Invalid=9367, Unknown=0, NotChecked=0, Total=12656 [2021-11-03 05:00:51,713 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 113 states, 112 states have (on average 2.982142857142857) internal successors, (334), 113 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:01:38,113 WARN L207 SmtUtils]: Spent 31.75 s on a formula simplification that was a NOOP. DAG size: 258 [2021-11-03 05:02:45,980 WARN L207 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 254 DAG size of output: 254 [2021-11-03 05:03:38,830 WARN L207 SmtUtils]: Spent 27.62 s on a formula simplification that was a NOOP. DAG size: 248 [2021-11-03 05:04:33,289 WARN L207 SmtUtils]: Spent 52.58 s on a formula simplification. DAG size of input: 243 DAG size of output: 243 [2021-11-03 05:05:23,686 WARN L207 SmtUtils]: Spent 27.46 s on a formula simplification that was a NOOP. DAG size: 237 [2021-11-03 05:06:17,016 WARN L207 SmtUtils]: Spent 51.07 s on a formula simplification. DAG size of input: 232 DAG size of output: 232 [2021-11-03 05:06:46,173 WARN L207 SmtUtils]: Spent 26.06 s on a formula simplification that was a NOOP. DAG size: 227 [2021-11-03 05:07:25,068 WARN L207 SmtUtils]: Spent 36.58 s on a formula simplification. DAG size of input: 222 DAG size of output: 222 [2021-11-03 05:07:55,960 WARN L207 SmtUtils]: Spent 26.97 s on a formula simplification that was a NOOP. DAG size: 216