./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array01-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_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/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_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/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_9a97467f-8052-487d-9978-6cd342b2fe81/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 c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:25:36,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:25:36,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:25:36,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:25:36,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:25:36,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:25:36,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:25:36,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:25:36,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:25:36,833 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:25:36,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:25:36,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:25:36,837 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:25:36,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:25:36,840 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:25:36,842 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:25:36,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:25:36,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:25:36,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:25:36,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:25:36,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:25:36,854 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:25:36,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:25:36,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:25:36,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:25:36,862 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:25:36,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:25:36,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:25:36,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:25:36,865 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:25:36,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:25:36,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:25:36,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:25:36,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:25:36,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:25:36,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:25:36,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:25:36,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:25:36,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:25:36,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:25:36,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:25:36,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 04:25:36,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:25:36,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:25:36,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:25:36,927 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:25:36,927 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:25:36,927 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:25:36,927 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:25:36,928 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:25:36,928 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:25:36,928 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:25:36,928 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:25:36,929 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:25:36,929 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:25:36,929 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:25:36,930 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:25:36,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:25:36,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:25:36,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:25:36,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:25:36,931 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:25:36,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:25:36,932 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:25:36,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:25:36,932 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:25:36,933 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:25:36,933 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:25:36,933 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:25:36,933 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:25:36,934 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:25:36,934 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:25:36,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:25:36,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:25:36,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:25:36,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:25:36,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:25:36,935 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:25:36,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:25:36,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:25:36,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:25:36,936 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_9a97467f-8052-487d-9978-6cd342b2fe81/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-03 04:25:37,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:25:37,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:25:37,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:25:37,275 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:25:37,276 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:25:37,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-03 04:25:37,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/a5736b6e7/23842a85a51140869ad1dae1f34ffb9e/FLAGc6990daf1 [2021-11-03 04:25:37,977 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:25:37,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-03 04:25:38,001 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/a5736b6e7/23842a85a51140869ad1dae1f34ffb9e/FLAGc6990daf1 [2021-11-03 04:25:38,235 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/a5736b6e7/23842a85a51140869ad1dae1f34ffb9e [2021-11-03 04:25:38,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:25:38,239 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:25:38,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:25:38,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:25:38,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:25:38,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:25:38" (1/1) ... [2021-11-03 04:25:38,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204db2e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:38, skipping insertion in model container [2021-11-03 04:25:38,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:25:38" (1/1) ... [2021-11-03 04:25:38,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:25:38,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:25:38,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:25:38,697 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 04:25:38,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7b3e63fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:38, skipping insertion in model container [2021-11-03 04:25:38,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:25:38,700 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:25:38,703 INFO L168 Benchmark]: Toolchain (without parser) took 461.63 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.2 MB in the beginning and 83.4 MB in the end (delta: -31.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:25:38,705 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 69.4 MB in the end (delta: 61.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:25:38,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.72 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.0 MB in the beginning and 83.4 MB in the end (delta: -31.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:25:38,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory was 69.4 MB in the beginning and 69.4 MB in the end (delta: 61.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.72 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.0 MB in the beginning and 83.4 MB in the end (delta: -31.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/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_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/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_9a97467f-8052-487d-9978-6cd342b2fe81/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 c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:25:41,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:25:41,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:25:41,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:25:41,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:25:41,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:25:41,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:25:41,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:25:41,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:25:41,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:25:41,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:25:41,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:25:41,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:25:41,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:25:41,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:25:41,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:25:41,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:25:41,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:25:41,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:25:41,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:25:41,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:25:41,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:25:41,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:25:41,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:25:41,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:25:41,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:25:41,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:25:41,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:25:41,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:25:41,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:25:41,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:25:41,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:25:41,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:25:41,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:25:41,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:25:41,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:25:41,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:25:41,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:25:41,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:25:41,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:25:41,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:25:41,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 04:25:41,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:25:41,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:25:41,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:25:41,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:25:41,320 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:25:41,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:25:41,321 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:25:41,321 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:25:41,321 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:25:41,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 04:25:41,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 04:25:41,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:25:41,325 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:25:41,325 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 04:25:41,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:25:41,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:25:41,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:25:41,326 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 04:25:41,326 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 04:25:41,326 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 04:25:41,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:25:41,327 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:25:41,327 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:25:41,327 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:25:41,327 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:25:41,327 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:25:41,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:25:41,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:25:41,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:25:41,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:25:41,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:25:41,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:25:41,329 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:25:41,330 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:41,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:25:41,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:25:41,330 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_9a97467f-8052-487d-9978-6cd342b2fe81/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-03 04:25:41,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:25:41,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:25:41,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:25:41,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:25:41,750 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:25:41,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-03 04:25:41,829 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/60579db74/dfbe02b2db23400684acc7628b8627af/FLAG5e0f01514 [2021-11-03 04:25:42,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:25:42,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-03 04:25:42,565 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/60579db74/dfbe02b2db23400684acc7628b8627af/FLAG5e0f01514 [2021-11-03 04:25:42,818 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/data/60579db74/dfbe02b2db23400684acc7628b8627af [2021-11-03 04:25:42,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:25:42,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:25:42,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:25:42,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:25:42,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:25:42,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:25:42" (1/1) ... [2021-11-03 04:25:42,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71504a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:42, skipping insertion in model container [2021-11-03 04:25:42,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:25:42" (1/1) ... [2021-11-03 04:25:42,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:25:42,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:25:43,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:25:43,169 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:25:43,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:25:43,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:25:43,211 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:25:43,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:25:43,301 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:25:43,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43 WrapperNode [2021-11-03 04:25:43,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:25:43,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:25:43,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:25:43,304 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:25:43,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:25:43,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:25:43,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:25:43,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:25:43,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:25:43,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:25:43,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:25:43,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:25:43,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (1/1) ... [2021-11-03 04:25:43,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:25:43,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:43,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:25:43,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:25:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:25:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:25:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:25:43,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:25:43,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:25:43,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:25:43,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:25:43,960 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-03 04:25:43,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:25:43 BoogieIcfgContainer [2021-11-03 04:25:43,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:25:43,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:25:43,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:25:43,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:25:43,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:25:42" (1/3) ... [2021-11-03 04:25:43,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28489e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:25:43, skipping insertion in model container [2021-11-03 04:25:43,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:25:43" (2/3) ... [2021-11-03 04:25:43,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f28489e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:25:43, skipping insertion in model container [2021-11-03 04:25:43,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:25:43" (3/3) ... [2021-11-03 04:25:43,971 INFO L111 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2021-11-03 04:25:43,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:25:43,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-03 04:25:44,020 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:25:44,026 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 04:25:44,027 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-03 04:25:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:25:44,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:25:44,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:44,047 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:25:44,048 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-03 04:25:44,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:44,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920483623] [2021-11-03 04:25:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:44,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:44,090 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:44,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:25:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:25:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:44,282 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 04:25:44,332 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 04:25:44,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:44,379 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 04:25:44,381 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:44,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920483623] [2021-11-03 04:25:44,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920483623] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:44,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:44,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:25:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874139577] [2021-11-03 04:25:44,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:25:44,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:25:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:25:44,425 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 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 04:25:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:44,531 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-03 04:25:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:25:44,533 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 04:25:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:44,541 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:25:44,543 INFO L226 Difference]: Without dead ends: 28 [2021-11-03 04:25:44,545 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 04:25:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-03 04:25:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-03 04:25:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:44,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-03 04:25:44,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-11-03 04:25:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:44,578 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-03 04:25:44,578 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 04:25:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-03 04:25:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:25:44,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:44,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:25:44,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:44,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:44,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:44,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:44,794 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-03 04:25:44,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:44,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165916776] [2021-11-03 04:25:44,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:44,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:44,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:44,797 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:44,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:25:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 04:25:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:44,924 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 04:25:44,974 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 04:25:44,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:45,193 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 04:25:45,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:45,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165916776] [2021-11-03 04:25:45,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165916776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:45,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:45,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 04:25:45,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914276505] [2021-11-03 04:25:45,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:25:45,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:25:45,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:25:45,207 INFO L87 Difference]: Start difference. First operand 28 states and 31 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 04:25:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:45,810 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-03 04:25:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:25:45,812 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 04:25:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:45,814 INFO L225 Difference]: With dead ends: 78 [2021-11-03 04:25:45,814 INFO L226 Difference]: Without dead ends: 78 [2021-11-03 04:25:45,815 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 04:25:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-03 04:25:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2021-11-03 04:25:45,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-03 04:25:45,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-03 04:25:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-03 04:25:45,838 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 04:25:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-03 04:25:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:25:45,842 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:45,843 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:45,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:46,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:46,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-03 04:25:46,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:46,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079289668] [2021-11-03 04:25:46,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:46,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:46,061 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:46,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:25:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:46,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:25:46,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:46,162 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 04:25:46,206 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 04:25:46,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:46,240 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 04:25:46,240 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:46,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079289668] [2021-11-03 04:25:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079289668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:46,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:46,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:25:46,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026858638] [2021-11-03 04:25:46,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:25:46,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:25:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:25:46,243 INFO L87 Difference]: Start difference. First operand 32 states and 36 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 04:25:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:46,350 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-03 04:25:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:25:46,351 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 04:25:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:46,352 INFO L225 Difference]: With dead ends: 29 [2021-11-03 04:25:46,352 INFO L226 Difference]: Without dead ends: 29 [2021-11-03 04:25:46,352 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 04:25:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-03 04:25:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-03 04:25:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:46,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-03 04:25:46,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-03 04:25:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:46,356 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-03 04:25:46,356 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 04:25:46,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-03 04:25:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 04:25:46,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:46,357 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:46,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:46,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:46,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-03 04:25:46,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:46,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627961919] [2021-11-03 04:25:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:46,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:46,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:46,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:46,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:25:46,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:25:46,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:46,677 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 04:25:46,773 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 04:25:46,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:47,165 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 04:25:47,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:47,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627961919] [2021-11-03 04:25:47,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627961919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:47,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:47,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-03 04:25:47,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085356604] [2021-11-03 04:25:47,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:25:47,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:47,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:25:47,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:25:47,168 INFO L87 Difference]: Start difference. First operand 29 states and 33 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 04:25:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:47,608 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-03 04:25:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:25:47,611 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 04:25:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:47,611 INFO L225 Difference]: With dead ends: 35 [2021-11-03 04:25:47,612 INFO L226 Difference]: Without dead ends: 35 [2021-11-03 04:25:47,612 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:25:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-03 04:25:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-03 04:25:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-03 04:25:47,616 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-03 04:25:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:47,616 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-03 04:25:47,617 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 04:25:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-03 04:25:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:25:47,617 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:47,617 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:47,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:47,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:47,827 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-03 04:25:47,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:47,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802595953] [2021-11-03 04:25:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:47,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:47,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:25:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:47,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:25:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:47,985 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 04:25:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:48,053 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 04:25:48,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:48,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802595953] [2021-11-03 04:25:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802595953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:48,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2131801009] [2021-11-03 04:25:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:48,054 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:25:48,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:25:48,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:25:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:48,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:25:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:48,240 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 04:25:48,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:48,281 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 04:25:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2131801009] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:48,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854998588] [2021-11-03 04:25:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:48,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:48,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:25:48,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-03 04:25:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:25:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:48,457 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 04:25:48,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:48,507 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 04:25:48,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854998588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:48,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:25:48,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:25:48,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152131459] [2021-11-03 04:25:48,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:25:48,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:25:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:25:48,509 INFO L87 Difference]: Start difference. First operand 27 states and 31 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 04:25:48,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:48,578 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-03 04:25:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:25:48,579 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 04:25:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:48,580 INFO L225 Difference]: With dead ends: 49 [2021-11-03 04:25:48,580 INFO L226 Difference]: Without dead ends: 49 [2021-11-03 04:25:48,581 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 04:25:48,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-03 04:25:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-03 04:25:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:25:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-03 04:25:48,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-11-03 04:25:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-03 04:25:48,586 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 04:25:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-03 04:25:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-03 04:25:48,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:48,587 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:48,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:48,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:49,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-03 04:25:49,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:49,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-03 04:25:49,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:49,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144356104] [2021-11-03 04:25:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:49,191 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:49,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:49,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:49,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 04:25:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:49,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:25:49,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:49,324 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 04:25:49,594 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 04:25:49,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:50,207 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 04:25:50,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:50,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144356104] [2021-11-03 04:25:50,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144356104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:50,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149928136] [2021-11-03 04:25:50,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:50,208 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:50,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:25:50,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:25:50,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-03 04:25:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:25:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:50,413 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 04:25:50,576 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 04:25:50,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:50,857 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 04:25:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149928136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:50,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52018473] [2021-11-03 04:25:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:50,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:50,858 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:25:50,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-03 04:25:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:25:50,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:51,020 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 04:25:51,171 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 04:25:51,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:51,428 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 04:25:51,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52018473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:51,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:25:51,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2021-11-03 04:25:51,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067586771] [2021-11-03 04:25:51,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 04:25:51,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:51,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 04:25:51,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:25:51,431 INFO L87 Difference]: Start difference. First operand 33 states and 37 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 04:25:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:52,393 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-11-03 04:25:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:25:52,395 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 04:25:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:52,396 INFO L225 Difference]: With dead ends: 77 [2021-11-03 04:25:52,397 INFO L226 Difference]: Without dead ends: 77 [2021-11-03 04:25:52,397 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 04:25:52,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-03 04:25:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2021-11-03 04:25:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 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 04:25:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-11-03 04:25:52,404 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 10 [2021-11-03 04:25:52,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:52,405 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-11-03 04:25:52,405 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 04:25:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-11-03 04:25:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-03 04:25:52,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:52,407 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:52,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:52,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 04:25:52,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:53,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:53,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:53,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:53,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-11-03 04:25:53,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:53,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1404547419] [2021-11-03 04:25:53,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:53,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:53,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:53,012 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:53,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 04:25:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:53,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:25:53,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:53,181 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 04:25:53,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:53,230 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 04:25:53,231 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:53,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1404547419] [2021-11-03 04:25:53,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1404547419] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:25:53,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:25:53,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 04:25:53,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651784536] [2021-11-03 04:25:53,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:25:53,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:53,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:25:53,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 04:25:53,232 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:53,354 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-11-03 04:25:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:25:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-03 04:25:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:53,357 INFO L225 Difference]: With dead ends: 68 [2021-11-03 04:25:53,357 INFO L226 Difference]: Without dead ends: 68 [2021-11-03 04:25:53,357 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 04:25:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-03 04:25:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2021-11-03 04:25:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-03 04:25:53,362 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 14 [2021-11-03 04:25:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:53,363 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-03 04:25:53,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-03 04:25:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:25:53,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:53,364 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:53,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:53,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:25:53,565 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-11-03 04:25:53,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:53,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733858635] [2021-11-03 04:25:53,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:53,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:53,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:53,566 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:53,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:25:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:25:53,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:53,786 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 04:25:53,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:53,880 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 04:25:53,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:53,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733858635] [2021-11-03 04:25:53,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733858635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:53,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1851638167] [2021-11-03 04:25:53,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:53,881 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:53,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:25:53,882 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:25:53,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:25:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:25:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:54,158 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 04:25:54,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:54,227 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 04:25:54,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1851638167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:54,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325408687] [2021-11-03 04:25:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:54,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:54,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:54,232 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:25:54,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:25:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:25:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:54,480 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 04:25:54,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:54,536 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 04:25:54,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325408687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:54,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:25:54,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-03 04:25:54,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522057816] [2021-11-03 04:25:54,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:25:54,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:25:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-03 04:25:54,544 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 04:25:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:25:54,649 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-03 04:25:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:25:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:25:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:25:54,651 INFO L225 Difference]: With dead ends: 59 [2021-11-03 04:25:54,651 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:25:54,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 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 04:25:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:25:54,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-11-03 04:25:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:25:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-11-03 04:25:54,656 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 16 [2021-11-03 04:25:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:25:54,656 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-11-03 04:25:54,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 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 04:25:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-11-03 04:25:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-03 04:25:54,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:25:54,658 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:25:54,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:54,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-03 04:25:55,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:25:55,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:55,263 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:25:55,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:25:55,264 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-11-03 04:25:55,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:25:55,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90545086] [2021-11-03 04:25:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:55,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:25:55,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:25:55,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:25:55,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 04:25:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:25:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:55,460 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 04:25:55,804 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 04:25:55,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:56,682 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 04:25:56,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:25:56,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90545086] [2021-11-03 04:25:56,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90545086] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:56,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1425822934] [2021-11-03 04:25:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:56,683 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:25:56,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:25:56,684 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:25:56,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 04:25:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 04:25:56,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:57,285 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 04:25:57,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:57,607 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 04:25:57,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1425822934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:57,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965761089] [2021-11-03 04:25:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:25:57,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:25:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:25:57,610 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:25:57,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 04:25:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:25:57,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:25:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:25:57,867 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 04:25:58,110 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 04:25:58,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:25:58,502 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 04:25:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965761089] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:25:58,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:25:58,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 6, 6] total 22 [2021-11-03 04:25:58,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383759081] [2021-11-03 04:25:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-03 04:25:58,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:25:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-03 04:25:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-03 04:25:58,504 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 04:26:01,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:01,069 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2021-11-03 04:26:01,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:26:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-03 04:26:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:01,071 INFO L225 Difference]: With dead ends: 104 [2021-11-03 04:26:01,072 INFO L226 Difference]: Without dead ends: 104 [2021-11-03 04:26:01,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=311, Invalid=1249, Unknown=0, NotChecked=0, Total=1560 [2021-11-03 04:26:01,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-03 04:26:01,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-11-03 04:26:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 78 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 04:26:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-11-03 04:26:01,080 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 16 [2021-11-03 04:26:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:01,080 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-11-03 04:26:01,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 04:26:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-11-03 04:26:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 04:26:01,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:01,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:01,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:01,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:01,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:01,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:01,687 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:26:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:01,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-11-03 04:26:01,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:01,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882997144] [2021-11-03 04:26:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:26:01,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:01,690 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:01,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 04:26:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:26:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 04:26:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:01,920 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 04:26:02,120 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 04:26:02,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:04,262 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 04:26:04,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:04,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882997144] [2021-11-03 04:26:04,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882997144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:26:04,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:26:04,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-03 04:26:04,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725141295] [2021-11-03 04:26:04,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:26:04,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:26:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-03 04:26:04,265 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:04,387 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2021-11-03 04:26:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:26:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-03 04:26:04,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:04,389 INFO L225 Difference]: With dead ends: 78 [2021-11-03 04:26:04,389 INFO L226 Difference]: Without dead ends: 59 [2021-11-03 04:26:04,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 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 04:26:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-03 04:26:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-03 04:26:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-11-03 04:26:04,393 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 18 [2021-11-03 04:26:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:04,393 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-11-03 04:26:04,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:26:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-11-03 04:26:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 04:26:04,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:04,395 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-03 04:26:04,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:04,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:04,595 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:26:04,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash 302966996, now seen corresponding path program 2 times [2021-11-03 04:26:04,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:04,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205910554] [2021-11-03 04:26:04,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:04,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:04,597 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:04,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 04:26:04,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:04,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:04,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:26:04,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:04,975 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 04:26:05,638 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 04:26:05,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:07,507 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 04:26:07,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:07,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205910554] [2021-11-03 04:26:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205910554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:07,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [999422432] [2021-11-03 04:26:07,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:07,511 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:07,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:07,512 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:07,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 04:26:07,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 04:26:07,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:07,988 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 04:26:08,435 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 04:26:08,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:09,233 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 04:26:09,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [999422432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:09,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544239652] [2021-11-03 04:26:09,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:09,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:09,240 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:09,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 04:26:09,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:09,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-03 04:26:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:09,655 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 04:26:10,220 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 04:26:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:11,912 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 04:26:11,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544239652] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:11,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:11,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 22 [2021-11-03 04:26:11,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37202894] [2021-11-03 04:26:11,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:26:11,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:11,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:26:11,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:26:11,914 INFO L87 Difference]: Start difference. First operand 59 states and 66 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 04:26:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:17,955 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2021-11-03 04:26:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:26:17,957 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 04:26:17,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:17,959 INFO L225 Difference]: With dead ends: 335 [2021-11-03 04:26:17,959 INFO L226 Difference]: Without dead ends: 335 [2021-11-03 04:26:17,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:26:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-03 04:26:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 83. [2021-11-03 04:26:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 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 04:26:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-11-03 04:26:17,969 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 22 [2021-11-03 04:26:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:17,969 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-11-03 04:26:17,969 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 04:26:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-11-03 04:26:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 04:26:17,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:17,971 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:17,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:18,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:18,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-03 04:26:18,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:26:18,593 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:26:18,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2021775754, now seen corresponding path program 2 times [2021-11-03 04:26:18,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:18,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057476109] [2021-11-03 04:26:18,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:18,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:18,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:18,595 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:18,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 04:26:18,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:18,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:26:18,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:19,038 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 04:26:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:19,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:22,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057476109] [2021-11-03 04:26:22,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057476109] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:22,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1263451986] [2021-11-03 04:26:22,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:22,495 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:22,496 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:22,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 04:26:23,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:23,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:23,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:26:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:23,950 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:26:23,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:24,954 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-03 04:26:24,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1263451986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:24,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201871955] [2021-11-03 04:26:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:26:24,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:24,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:24,965 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:24,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-03 04:26:25,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:26:25,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-03 04:26:25,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:26:26,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:26:27,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201871955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:27,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:27,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 49 [2021-11-03 04:26:27,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313815555] [2021-11-03 04:26:27,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-03 04:26:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-03 04:26:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2100, Unknown=0, NotChecked=0, Total=2352 [2021-11-03 04:26:27,109 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 49 states, 49 states have (on average 2.816326530612245) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 04:26:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:26:37,730 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2021-11-03 04:26:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:26:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.816326530612245) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-03 04:26:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:26:37,732 INFO L225 Difference]: With dead ends: 134 [2021-11-03 04:26:37,732 INFO L226 Difference]: Without dead ends: 87 [2021-11-03 04:26:37,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=646, Invalid=3776, Unknown=0, NotChecked=0, Total=4422 [2021-11-03 04:26:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-03 04:26:37,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-11-03 04:26:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 82 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 04:26:37,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2021-11-03 04:26:37,740 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 32 [2021-11-03 04:26:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:26:37,740 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2021-11-03 04:26:37,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.816326530612245) internal successors, (138), 49 states have internal predecessors, (138), 0 states have call successors, (0), 0 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 04:26:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2021-11-03 04:26:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 04:26:37,742 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:26:37,743 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:26:37,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:37,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:38,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-03 04:26:38,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:38,355 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:26:38,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:26:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1584580368, now seen corresponding path program 3 times [2021-11-03 04:26:38,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:26:38,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900256672] [2021-11-03 04:26:38,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:38,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:26:38,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:26:38,358 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:26:38,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 04:26:38,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:38,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:26:38,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:39,012 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 04:26:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:39,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:42,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:26:42,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900256672] [2021-11-03 04:26:42,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900256672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:42,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1951234298] [2021-11-03 04:26:42,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:42,223 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:26:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:26:42,224 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:26:42,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-03 04:26:43,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:43,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:43,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-03 04:26:43,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:43,473 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 04:26:44,924 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 04:26:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:45,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:26:51,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1951234298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:51,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573584207] [2021-11-03 04:26:51,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:26:51,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:26:51,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:26:51,899 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:26:51,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-03 04:26:52,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-03 04:26:52,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:26:52,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-03 04:26:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:26:52,745 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 04:26:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:53,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:26:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:26:57,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573584207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:26:57,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:26:57,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 16, 17, 11, 11] total 54 [2021-11-03 04:26:57,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567138137] [2021-11-03 04:26:57,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-03 04:26:57,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:26:57,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-03 04:26:57,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2021-11-03 04:26:57,558 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 04:27:43,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:27:43,147 INFO L93 Difference]: Finished difference Result 171 states and 191 transitions. [2021-11-03 04:27:43,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-03 04:27:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 04:27:43,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:27:43,150 INFO L225 Difference]: With dead ends: 171 [2021-11-03 04:27:43,151 INFO L226 Difference]: Without dead ends: 137 [2021-11-03 04:27:43,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 50.2s TimeCoverageRelationStatistics Valid=1187, Invalid=5619, Unknown=0, NotChecked=0, Total=6806 [2021-11-03 04:27:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-03 04:27:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-11-03 04:27:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.1395348837209303) internal successors, (147), 130 states have internal predecessors, (147), 0 states have call successors, (0), 0 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 04:27:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2021-11-03 04:27:43,159 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 40 [2021-11-03 04:27:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:27:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2021-11-03 04:27:43,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.7777777777777777) internal successors, (150), 54 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 04:27:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2021-11-03 04:27:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-03 04:27:43,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:27:43,162 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2021-11-03 04:27:43,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:43,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-03 04:27:43,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-03 04:27:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:27:43,767 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:27:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:27:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1048882662, now seen corresponding path program 3 times [2021-11-03 04:27:43,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:27:43,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124672324] [2021-11-03 04:27:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:27:43,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:27:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:27:43,769 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:27:43,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 04:27:44,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:27:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:27:44,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:44,722 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 04:27:46,204 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 04:27:46,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:27:50,631 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 04:27:50,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:27:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124672324] [2021-11-03 04:27:50,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124672324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:27:50,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1898214282] [2021-11-03 04:27:50,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:27:50,632 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:27:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:27:50,635 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:27:50,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-03 04:27:53,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:27:53,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:27:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-03 04:27:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:27:53,267 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 04:27:54,823 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 04:27:54,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:11,473 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 04:28:11,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1898214282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:11,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008189465] [2021-11-03 04:28:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 04:28:11,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:28:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:28:11,474 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:28:11,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-03 04:28:19,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-03 04:28:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:28:19,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-03 04:28:19,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:28:19,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:28:21,138 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 04:28:21,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:28:33,580 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 04:28:33,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008189465] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:28:33,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:28:33,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17, 21, 19, 19] total 67 [2021-11-03 04:28:33,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404358533] [2021-11-03 04:28:33,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-03 04:28:33,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:28:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-03 04:28:33,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=3334, Unknown=0, NotChecked=0, Total=4556 [2021-11-03 04:28:33,585 INFO L87 Difference]: Start difference. First operand 131 states and 147 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 04:30:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:30:08,555 INFO L93 Difference]: Finished difference Result 1523 states and 1711 transitions. [2021-11-03 04:30:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:30:08,557 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 04:30:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:30:08,564 INFO L225 Difference]: With dead ends: 1523 [2021-11-03 04:30:08,565 INFO L226 Difference]: Without dead ends: 1523 [2021-11-03 04:30:08,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 206 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3627 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=2582, Invalid=6348, Unknown=0, NotChecked=0, Total=8930 [2021-11-03 04:30:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1523 states. [2021-11-03 04:30:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1523 to 179. [2021-11-03 04:30:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.1694915254237288) internal successors, (207), 178 states have internal predecessors, (207), 0 states have call successors, (0), 0 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 04:30:08,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 207 transitions. [2021-11-03 04:30:08,584 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 207 transitions. Word has length 46 [2021-11-03 04:30:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:30:08,585 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 207 transitions. [2021-11-03 04:30:08,585 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 04:30:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 207 transitions. [2021-11-03 04:30:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:30:08,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:30:08,588 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:30:08,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:08,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:09,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 04:30:09,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:30:09,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:30:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:30:09,195 INFO L85 PathProgramCache]: Analyzing trace with hash 565958021, now seen corresponding path program 4 times [2021-11-03 04:30:09,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:30:09,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785418353] [2021-11-03 04:30:09,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:09,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:30:09,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:30:09,197 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:30:09,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-03 04:30:10,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-03 04:30:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:10,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-03 04:30:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 90 proven. 143 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:30:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:30:20,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:30:20,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785418353] [2021-11-03 04:30:20,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785418353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:20,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1042262328] [2021-11-03 04:30:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:20,445 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:30:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:30:20,453 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:30:20,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-03 04:30:22,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:22,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:30:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:30:24,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:30:28,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1042262328] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:28,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417677397] [2021-11-03 04:30:28,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-03 04:30:28,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:30:28,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:30:28,121 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:30:28,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-03 04:30:29,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-03 04:30:29,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:30:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-03 04:30:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:30:29,643 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 04:30:29,848 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 04:30:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:30:32,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:30:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-03 04:30:35,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417677397] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:30:35,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:30:35,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 17, 16, 19, 17] total 83 [2021-11-03 04:30:35,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888808770] [2021-11-03 04:30:35,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-03 04:30:35,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:30:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-03 04:30:35,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=6286, Unknown=0, NotChecked=0, Total=6806 [2021-11-03 04:30:35,285 INFO L87 Difference]: Start difference. First operand 179 states and 207 transitions. Second operand has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 04:31:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:31:29,838 INFO L93 Difference]: Finished difference Result 334 states and 377 transitions. [2021-11-03 04:31:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-03 04:31:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 04:31:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:31:29,842 INFO L225 Difference]: With dead ends: 334 [2021-11-03 04:31:29,842 INFO L226 Difference]: Without dead ends: 292 [2021-11-03 04:31:29,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3401 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=1799, Invalid=13453, Unknown=0, NotChecked=0, Total=15252 [2021-11-03 04:31:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-03 04:31:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 188. [2021-11-03 04:31:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1612903225806452) internal successors, (216), 187 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 04:31:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 216 transitions. [2021-11-03 04:31:29,853 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 216 transitions. Word has length 68 [2021-11-03 04:31:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:31:29,854 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 216 transitions. [2021-11-03 04:31:29,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 0 states have call successors, (0), 0 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 04:31:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 216 transitions. [2021-11-03 04:31:29,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:31:29,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:31:29,857 INFO L513 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:31:29,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:30,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-03 04:31:30,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:30,467 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:31:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:31:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 253880091, now seen corresponding path program 5 times [2021-11-03 04:31:30,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:31:30,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080606989] [2021-11-03 04:31:30,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:31:30,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:31:30,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:31:30,470 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:31:30,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-03 04:31:32,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-03 04:31:32,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:31:32,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-03 04:31:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:31:32,188 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 04:31:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 120 proven. 164 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-03 04:31:33,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:31:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:31:43,127 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:31:43,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080606989] [2021-11-03 04:31:43,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080606989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:31:43,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [634425739] [2021-11-03 04:31:43,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:31:43,128 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:31:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:31:43,129 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:31:43,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-03 04:35:14,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-03 04:35:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:35:15,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-03 04:35:15,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 123 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:35:18,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 123 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:35:22,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [634425739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:22,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200015093] [2021-11-03 04:35:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-03 04:35:22,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:35:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:35:22,131 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:35:22,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-03 04:35:29,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-03 04:35:29,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:35:29,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-03 04:35:29,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:35:29,152 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 04:35:29,494 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 04:35:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 123 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:35:32,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:35:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 123 proven. 157 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-03 04:35:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200015093] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:35:36,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:35:36,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 19, 18, 21, 20] total 93 [2021-11-03 04:35:36,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697514048] [2021-11-03 04:35:36,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-03 04:35:36,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:35:36,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-03 04:35:36,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=7919, Unknown=0, NotChecked=0, Total=8556 [2021-11-03 04:35:36,656 INFO L87 Difference]: Start difference. First operand 188 states and 216 transitions. Second operand has 93 states, 93 states have (on average 3.3548387096774195) internal successors, (312), 93 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 04:36:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:36:10,688 INFO L93 Difference]: Finished difference Result 304 states and 342 transitions. [2021-11-03 04:36:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-03 04:36:10,690 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.3548387096774195) internal successors, (312), 93 states have internal predecessors, (312), 0 states have call successors, (0), 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 76 [2021-11-03 04:36:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:36:10,691 INFO L225 Difference]: With dead ends: 304 [2021-11-03 04:36:10,691 INFO L226 Difference]: Without dead ends: 189 [2021-11-03 04:36:10,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=1767, Invalid=13485, Unknown=0, NotChecked=0, Total=15252 [2021-11-03 04:36:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-03 04:36:10,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 179. [2021-11-03 04:36:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 177 states have (on average 1.152542372881356) internal successors, (204), 178 states have internal predecessors, (204), 0 states have call successors, (0), 0 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 04:36:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2021-11-03 04:36:10,697 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 76 [2021-11-03 04:36:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:36:10,697 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2021-11-03 04:36:10,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.3548387096774195) internal successors, (312), 93 states have internal predecessors, (312), 0 states have call successors, (0), 0 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 04:36:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2021-11-03 04:36:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:36:10,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:36:10,699 INFO L513 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:36:10,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:10,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-03 04:36:11,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-03 04:36:11,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:11,307 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-03 04:36:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:36:11,307 INFO L85 PathProgramCache]: Analyzing trace with hash 266089230, now seen corresponding path program 6 times [2021-11-03 04:36:11,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:36:11,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [449477596] [2021-11-03 04:36:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:36:11,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:36:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:36:11,309 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:36:11,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-03 04:36:13,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-03 04:36:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-03 04:36:13,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:13,612 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 04:36:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-03 04:36:15,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:36:24,614 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-03 04:36:24,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:36:24,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [449477596] [2021-11-03 04:36:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [449477596] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:36:24,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [275737355] [2021-11-03 04:36:24,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:36:24,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:36:24,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:36:24,615 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:36:24,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-03 04:36:32,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-03 04:36:32,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:36:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-03 04:36:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:36:32,644 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 04:36:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 68 proven. 248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 04:36:37,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:07,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [275737355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:07,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144678988] [2021-11-03 04:37:07,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-03 04:37:07,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:37:07,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:37:07,521 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:37:07,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a97467f-8052-487d-9978-6cd342b2fe81/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-03 04:37:12,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-03 04:37:12,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:37:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-03 04:37:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:37:12,078 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 04:37:14,614 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 24 treesize of output 20 [2021-11-03 04:37:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 38 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:37:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 38 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:37:28,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144678988] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:37:28,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 04:37:28,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 23, 28, 25, 24] total 105 [2021-11-03 04:37:28,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103774881] [2021-11-03 04:37:28,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-03 04:37:28,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:37:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-03 04:37:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1149, Invalid=9771, Unknown=0, NotChecked=0, Total=10920 [2021-11-03 04:37:28,945 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand has 105 states, 105 states have (on average 3.1904761904761907) internal successors, (335), 105 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)