./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.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_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:54:36,827 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:54:36,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:54:36,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:54:36,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:54:36,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:54:36,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:54:36,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:54:36,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:54:36,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:54:36,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:54:36,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:54:36,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:54:36,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:54:36,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:54:36,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:54:36,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:54:36,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:54:36,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:54:36,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:54:36,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:54:36,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:54:36,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:54:36,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:54:36,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:54:36,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:54:36,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:54:36,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:54:36,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:54:36,983 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:54:36,983 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:54:36,984 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:54:36,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:54:36,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:54:36,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:54:36,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:54:36,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:54:36,992 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:54:36,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:54:36,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:54:36,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:54:36,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:54:37,042 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:54:37,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:54:37,043 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:54:37,049 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:54:37,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:54:37,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:54:37,052 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:54:37,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:54:37,053 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:54:37,053 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:54:37,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:54:37,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:54:37,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:54:37,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:54:37,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:54:37,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:54:37,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:54:37,056 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:54:37,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:54:37,056 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:54:37,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:54:37,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:54:37,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:54:37,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:37,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:54:37,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:54:37,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:54:37,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:54:37,058 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:54:37,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d [2021-11-02 22:54:37,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:54:37,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:54:37,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:54:37,368 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:54:37,369 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:54:37,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-02 22:54:37,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/18588adc6/7fc2c30ec498422bacfd503f82b5fe31/FLAG9ad3f9e1e [2021-11-02 22:54:38,159 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:54:38,160 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-02 22:54:38,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/18588adc6/7fc2c30ec498422bacfd503f82b5fe31/FLAG9ad3f9e1e [2021-11-02 22:54:38,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/18588adc6/7fc2c30ec498422bacfd503f82b5fe31 [2021-11-02 22:54:38,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:54:38,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:54:38,368 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:38,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:54:38,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:54:38,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:38" (1/1) ... [2021-11-02 22:54:38,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6827cf10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:38, skipping insertion in model container [2021-11-02 22:54:38,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:38" (1/1) ... [2021-11-02 22:54:38,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:54:38,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:38,966 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-02 22:54:39,147 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-02 22:54:39,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:39,191 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) [2021-11-02 22:54:39,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1af3d415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:39, skipping insertion in model container [2021-11-02 22:54:39,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:39,195 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 22:54:39,198 INFO L168 Benchmark]: Toolchain (without parser) took 833.11 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 72.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:39,199 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:54:39,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 827.00 ms. Allocated memory is still 109.1 MB. Free memory was 74.8 MB in the beginning and 72.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:39,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 109.1 MB. Free memory is still 62.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 827.00 ms. Allocated memory is still 109.1 MB. Free memory was 74.8 MB in the beginning and 72.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:54:41,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:54:41,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:54:41,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:54:41,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:54:41,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:54:41,700 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:54:41,714 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:54:41,718 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:54:41,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:54:41,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:54:41,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:54:41,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:54:41,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:54:41,738 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:54:41,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:54:41,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:54:41,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:54:41,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:54:41,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:54:41,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:54:41,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:54:41,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:54:41,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:54:41,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:54:41,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:54:41,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:54:41,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:54:41,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:54:41,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:54:41,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:54:41,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:54:41,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:54:41,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:54:41,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:54:41,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:54:41,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:54:41,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:54:41,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:54:41,805 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:54:41,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:54:41,807 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:54:41,862 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:54:41,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:54:41,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:54:41,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:54:41,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:54:41,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:54:41,866 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:54:41,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:54:41,867 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:54:41,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:54:41,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:54:41,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:54:41,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:54:41,869 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:54:41,869 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:54:41,870 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:54:41,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:54:41,870 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:54:41,870 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:54:41,871 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:54:41,871 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:54:41,871 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:54:41,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:54:41,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:54:41,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:54:41,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:41,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:54:41,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:54:41,873 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:54:41,873 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:54:41,874 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:54:41,874 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:54:41,874 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_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d11f955236406002afd026860cf5cae6834e26918579de44c447a4ac30cb678d [2021-11-02 22:54:42,260 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:54:42,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:54:42,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:54:42,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:54:42,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:54:42,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-02 22:54:42,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/6db936dc5/2631e6841cff41288f1914cdd83c4f9a/FLAG484a8b667 [2021-11-02 22:54:43,131 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:54:43,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i [2021-11-02 22:54:43,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/6db936dc5/2631e6841cff41288f1914cdd83c4f9a/FLAG484a8b667 [2021-11-02 22:54:43,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/data/6db936dc5/2631e6841cff41288f1914cdd83c4f9a [2021-11-02 22:54:43,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:54:43,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:54:43,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:43,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:54:43,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:54:43,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:43" (1/1) ... [2021-11-02 22:54:43,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b8ee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:43, skipping insertion in model container [2021-11-02 22:54:43,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:43" (1/1) ... [2021-11-02 22:54:43,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:54:43,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:44,041 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-02 22:54:44,277 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-02 22:54:44,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:44,324 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 22:54:44,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:44,371 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-02 22:54:44,476 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-02 22:54:44,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:44,507 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:54:44,548 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[33021,33034] [2021-11-02 22:54:44,640 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test3-2.i[44590,44603] [2021-11-02 22:54:44,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:44,705 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:54:44,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44 WrapperNode [2021-11-02 22:54:44,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:44,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:54:44,707 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:54:44,707 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:54:44,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:44,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:45,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:54:45,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:54:45,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:54:45,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:54:45,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (1/1) ... [2021-11-02 22:54:45,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:45,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:54:45,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:54:45,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:54:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:54:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:54:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:54:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:54:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:54:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:54:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:54:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:54:45,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-02 22:54:45,103 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-02 22:54:45,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:54:45,103 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 22:54:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 22:54:45,103 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-02 22:54:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-02 22:54:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 22:54:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 22:54:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-02 22:54:45,104 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-02 22:54:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-02 22:54:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-02 22:54:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-02 22:54:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-02 22:54:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 22:54:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-02 22:54:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-02 22:54:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-02 22:54:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-02 22:54:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-02 22:54:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-02 22:54:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-02 22:54:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-02 22:54:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-02 22:54:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-02 22:54:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-02 22:54:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-02 22:54:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-02 22:54:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-02 22:54:45,110 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-02 22:54:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-02 22:54:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-02 22:54:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-02 22:54:45,111 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-02 22:54:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-02 22:54:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-02 22:54:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-02 22:54:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-02 22:54:45,112 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-02 22:54:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-02 22:54:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-02 22:54:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-02 22:54:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-02 22:54:45,113 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-02 22:54:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-02 22:54:45,114 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-02 22:54:45,115 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-02 22:54:45,116 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-02 22:54:45,116 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-02 22:54:45,117 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-02 22:54:45,117 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-02 22:54:45,117 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-02 22:54:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-02 22:54:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-02 22:54:45,118 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:54:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:54:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:54:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:54:45,119 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:54:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:54:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:54:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:54:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:54:45,120 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:54:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:54:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:54:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:54:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:54:45,121 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:54:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:54:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:54:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:54:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:54:45,122 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:54:45,123 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:54:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:54:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:54:45,124 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:54:45,125 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:54:45,125 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:54:45,125 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:54:45,125 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:54:45,125 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:54:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:54:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:54:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:54:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:54:45,126 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:54:45,127 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:54:45,127 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:54:45,127 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:54:45,127 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:54:45,127 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:54:45,128 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:54:45,128 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:54:45,128 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:54:45,128 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:54:45,129 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:54:45,129 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:54:45,129 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:54:45,130 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:54:45,130 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:54:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:54:45,134 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:54:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:54:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:54:45,136 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:54:45,137 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:54:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:54:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:54:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:54:45,138 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:54:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:54:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:54:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:54:45,145 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:54:45,146 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:54:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:54:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:54:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:54:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:54:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:54:45,149 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:54:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:54:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:54:45,150 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:54:45,151 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:54:45,152 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:54:45,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:54:45,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:54:45,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:54:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:54:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:54:45,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:54:45,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:54:45,821 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 22:54:51,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:54:51,331 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-02 22:54:51,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:51 BoogieIcfgContainer [2021-11-02 22:54:51,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:54:51,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:54:51,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:54:51,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:54:51,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:54:43" (1/3) ... [2021-11-02 22:54:51,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f790571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:51, skipping insertion in model container [2021-11-02 22:54:51,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:44" (2/3) ... [2021-11-02 22:54:51,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f790571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:51, skipping insertion in model container [2021-11-02 22:54:51,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:51" (3/3) ... [2021-11-02 22:54:51,351 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test3-2.i [2021-11-02 22:54:51,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:54:51,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 639 error locations. [2021-11-02 22:54:51,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:54:51,444 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 [2021-11-02 22:54:51,444 INFO L340 AbstractCegarLoop]: Starting to check reachability of 639 error locations. [2021-11-02 22:54:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 1279 states, 626 states have (on average 2.253993610223642) internal successors, (1411), 1267 states have internal predecessors, (1411), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-02 22:54:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:54:51,519 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:51,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:51,521 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:54:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:51,528 INFO L85 PathProgramCache]: Analyzing trace with hash 806083998, now seen corresponding path program 1 times [2021-11-02 22:54:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:51,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111723281] [2021-11-02 22:54:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:51,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:51,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:51,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:51,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:54:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:51,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:54:51,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:51,901 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 [2021-11-02 22:54:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:51,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:51,955 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111723281] [2021-11-02 22:54:51,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111723281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:51,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:51,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:54:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570044535] [2021-11-02 22:54:51,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:54:51,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:54:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:51,985 INFO L87 Difference]: Start difference. First operand has 1279 states, 626 states have (on average 2.253993610223642) internal successors, (1411), 1267 states have internal predecessors, (1411), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:54,755 INFO L93 Difference]: Finished difference Result 1451 states and 1536 transitions. [2021-11-02 22:54:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:54:54,760 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:54:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:54,788 INFO L225 Difference]: With dead ends: 1451 [2021-11-02 22:54:54,788 INFO L226 Difference]: Without dead ends: 1448 [2021-11-02 22:54:54,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:54:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-02 22:54:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1263. [2021-11-02 22:54:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 626 states have (on average 2.1070287539936103) internal successors, (1319), 1252 states have internal predecessors, (1319), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:54:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1340 transitions. [2021-11-02 22:54:54,938 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1340 transitions. Word has length 7 [2021-11-02 22:54:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:54,939 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 1340 transitions. [2021-11-02 22:54:54,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1340 transitions. [2021-11-02 22:54:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:54:54,940 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:54,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:54,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:55,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:55,148 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:54:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash 806083999, now seen corresponding path program 1 times [2021-11-02 22:54:55,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:55,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393707972] [2021-11-02 22:54:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:55,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:55,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:55,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:55,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:54:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:54:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:55,405 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 [2021-11-02 22:54:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:55,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:55,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:55,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393707972] [2021-11-02 22:54:55,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393707972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:55,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:55,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:54:55,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682246212] [2021-11-02 22:54:55,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:55,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:55,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:55,501 INFO L87 Difference]: Start difference. First operand 1263 states and 1340 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:02,497 INFO L93 Difference]: Finished difference Result 1936 states and 2058 transitions. [2021-11-02 22:55:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:02,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:55:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:02,510 INFO L225 Difference]: With dead ends: 1936 [2021-11-02 22:55:02,511 INFO L226 Difference]: Without dead ends: 1936 [2021-11-02 22:55:02,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:02,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-11-02 22:55:02,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1298. [2021-11-02 22:55:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 670 states have (on average 2.0865671641791046) internal successors, (1398), 1287 states have internal predecessors, (1398), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1419 transitions. [2021-11-02 22:55:02,579 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1419 transitions. Word has length 7 [2021-11-02 22:55:02,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:02,580 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1419 transitions. [2021-11-02 22:55:02,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:02,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1419 transitions. [2021-11-02 22:55:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:55:02,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:02,582 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:02,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:02,794 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:02,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1330049549, now seen corresponding path program 1 times [2021-11-02 22:55:02,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:02,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586530896] [2021-11-02 22:55:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:02,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:02,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:02,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:02,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:55:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:55:03,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:03,071 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 [2021-11-02 22:55:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:03,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:03,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:03,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586530896] [2021-11-02 22:55:03,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586530896] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:03,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:03,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:55:03,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856215263] [2021-11-02 22:55:03,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:55:03,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:55:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:03,147 INFO L87 Difference]: Start difference. First operand 1298 states and 1419 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:05,753 INFO L93 Difference]: Finished difference Result 1626 states and 1772 transitions. [2021-11-02 22:55:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-02 22:55:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:05,764 INFO L225 Difference]: With dead ends: 1626 [2021-11-02 22:55:05,764 INFO L226 Difference]: Without dead ends: 1626 [2021-11-02 22:55:05,765 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:55:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-02 22:55:05,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1249. [2021-11-02 22:55:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 670 states have (on average 2.008955223880597) internal successors, (1346), 1238 states have internal predecessors, (1346), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1367 transitions. [2021-11-02 22:55:05,804 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1367 transitions. Word has length 12 [2021-11-02 22:55:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:05,805 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1367 transitions. [2021-11-02 22:55:05,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1367 transitions. [2021-11-02 22:55:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:55:05,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:05,806 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:05,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:06,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:06,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1330049550, now seen corresponding path program 1 times [2021-11-02 22:55:06,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:06,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691989986] [2021-11-02 22:55:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:06,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:06,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:06,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:55:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:06,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:06,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:06,253 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 [2021-11-02 22:55:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:06,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:06,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:06,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691989986] [2021-11-02 22:55:06,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691989986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:06,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:06,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:55:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854419709] [2021-11-02 22:55:06,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:06,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:06,418 INFO L87 Difference]: Start difference. First operand 1249 states and 1367 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:11,833 INFO L93 Difference]: Finished difference Result 1669 states and 1779 transitions. [2021-11-02 22:55:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-02 22:55:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:11,844 INFO L225 Difference]: With dead ends: 1669 [2021-11-02 22:55:11,844 INFO L226 Difference]: Without dead ends: 1669 [2021-11-02 22:55:11,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-11-02 22:55:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1239. [2021-11-02 22:55:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 670 states have (on average 1.98955223880597) internal successors, (1333), 1228 states have internal predecessors, (1333), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:11,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1354 transitions. [2021-11-02 22:55:11,883 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1354 transitions. Word has length 12 [2021-11-02 22:55:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:11,883 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1354 transitions. [2021-11-02 22:55:11,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1354 transitions. [2021-11-02 22:55:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:55:11,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:11,885 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:11,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:12,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:12,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr526REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:12,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:12,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1636070505, now seen corresponding path program 1 times [2021-11-02 22:55:12,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:12,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324283907] [2021-11-02 22:55:12,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:12,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:12,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:12,100 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:12,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:55:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:55:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:12,505 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:12,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324283907] [2021-11-02 22:55:12,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324283907] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:12,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:12,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:55:12,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015093091] [2021-11-02 22:55:12,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:12,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:12,508 INFO L87 Difference]: Start difference. First operand 1239 states and 1354 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:13,610 INFO L93 Difference]: Finished difference Result 1881 states and 2038 transitions. [2021-11-02 22:55:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:55:13,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:55:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:13,623 INFO L225 Difference]: With dead ends: 1881 [2021-11-02 22:55:13,623 INFO L226 Difference]: Without dead ends: 1881 [2021-11-02 22:55:13,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:13,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-02 22:55:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1479. [2021-11-02 22:55:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 910 states have (on average 1.9637362637362636) internal successors, (1787), 1468 states have internal predecessors, (1787), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1808 transitions. [2021-11-02 22:55:13,679 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1808 transitions. Word has length 15 [2021-11-02 22:55:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:13,679 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1808 transitions. [2021-11-02 22:55:13,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1808 transitions. [2021-11-02 22:55:13,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:55:13,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:13,681 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:13,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:13,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:13,895 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr340REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -271696847, now seen corresponding path program 1 times [2021-11-02 22:55:13,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:13,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1044988945] [2021-11-02 22:55:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:13,896 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:13,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:13,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:55:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:55:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:14,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:14,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:14,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1044988945] [2021-11-02 22:55:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1044988945] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:14,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:14,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:55:14,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886349383] [2021-11-02 22:55:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:14,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:14,264 INFO L87 Difference]: Start difference. First operand 1479 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:14,295 INFO L93 Difference]: Finished difference Result 1649 states and 1966 transitions. [2021-11-02 22:55:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:14,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:55:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:14,304 INFO L225 Difference]: With dead ends: 1649 [2021-11-02 22:55:14,304 INFO L226 Difference]: Without dead ends: 1649 [2021-11-02 22:55:14,305 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-11-02 22:55:14,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1419. [2021-11-02 22:55:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 874 states have (on average 1.9462242562929062) internal successors, (1701), 1408 states have internal predecessors, (1701), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 1722 transitions. [2021-11-02 22:55:14,355 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 1722 transitions. Word has length 17 [2021-11-02 22:55:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:14,356 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 1722 transitions. [2021-11-02 22:55:14,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 1722 transitions. [2021-11-02 22:55:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:55:14,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:14,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:14,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:14,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:14,572 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr364REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash 892362763, now seen corresponding path program 1 times [2021-11-02 22:55:14,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:14,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076330804] [2021-11-02 22:55:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:14,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:14,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:14,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:14,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:55:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:14,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:14,950 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:14,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076330804] [2021-11-02 22:55:14,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076330804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:14,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:14,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 22:55:14,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620389093] [2021-11-02 22:55:14,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:14,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:14,953 INFO L87 Difference]: Start difference. First operand 1419 states and 1722 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:15,030 INFO L93 Difference]: Finished difference Result 1621 states and 1910 transitions. [2021-11-02 22:55:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:55:15,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:15,039 INFO L225 Difference]: With dead ends: 1621 [2021-11-02 22:55:15,039 INFO L226 Difference]: Without dead ends: 1621 [2021-11-02 22:55:15,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:55:15,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-11-02 22:55:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1389. [2021-11-02 22:55:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 858 states have (on average 1.9149184149184149) internal successors, (1643), 1378 states have internal predecessors, (1643), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1664 transitions. [2021-11-02 22:55:15,076 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1664 transitions. Word has length 19 [2021-11-02 22:55:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:15,077 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 1664 transitions. [2021-11-02 22:55:15,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1664 transitions. [2021-11-02 22:55:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:55:15,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:15,078 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:15,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:55:15,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:15,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr637ENSURES_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:15,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1468583665, now seen corresponding path program 1 times [2021-11-02 22:55:15,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:15,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234179232] [2021-11-02 22:55:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:15,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:15,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:15,296 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:15,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:55:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:55:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:55:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:55:15,655 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-02 22:55:15,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-02 22:55:15,737 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-02 22:55:15,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-02 22:55:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:15,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:15,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:15,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234179232] [2021-11-02 22:55:15,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234179232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:15,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:15,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:55:15,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792173697] [2021-11-02 22:55:15,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:55:15,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:15,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:55:15,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:55:15,872 INFO L87 Difference]: Start difference. First operand 1389 states and 1664 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:18,085 INFO L93 Difference]: Finished difference Result 1832 states and 2168 transitions. [2021-11-02 22:55:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:55:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:18,096 INFO L225 Difference]: With dead ends: 1832 [2021-11-02 22:55:18,096 INFO L226 Difference]: Without dead ends: 1832 [2021-11-02 22:55:18,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:55:18,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-02 22:55:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1388. [2021-11-02 22:55:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 857 states have (on average 1.9148191365227538) internal successors, (1641), 1377 states have internal predecessors, (1641), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1662 transitions. [2021-11-02 22:55:18,148 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1662 transitions. Word has length 20 [2021-11-02 22:55:18,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:18,148 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1662 transitions. [2021-11-02 22:55:18,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:18,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1662 transitions. [2021-11-02 22:55:18,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:55:18,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:18,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:18,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-02 22:55:18,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:18,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:18,366 INFO L85 PathProgramCache]: Analyzing trace with hash 833916409, now seen corresponding path program 1 times [2021-11-02 22:55:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:18,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128881680] [2021-11-02 22:55:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:18,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:18,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:18,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:55:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:18,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:55:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:18,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:18,708 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:18,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128881680] [2021-11-02 22:55:18,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128881680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:18,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:18,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:55:18,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191572526] [2021-11-02 22:55:18,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:18,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:18,710 INFO L87 Difference]: Start difference. First operand 1388 states and 1662 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:18,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:18,743 INFO L93 Difference]: Finished difference Result 1328 states and 1576 transitions. [2021-11-02 22:55:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:55:18,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-02 22:55:18,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:18,751 INFO L225 Difference]: With dead ends: 1328 [2021-11-02 22:55:18,751 INFO L226 Difference]: Without dead ends: 1328 [2021-11-02 22:55:18,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:18,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-11-02 22:55:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2021-11-02 22:55:18,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 821 states have (on average 1.8940316686967114) internal successors, (1555), 1317 states have internal predecessors, (1555), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:18,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1576 transitions. [2021-11-02 22:55:18,779 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1576 transitions. Word has length 22 [2021-11-02 22:55:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:18,780 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1576 transitions. [2021-11-02 22:55:18,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:18,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1576 transitions. [2021-11-02 22:55:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:55:18,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:18,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:18,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:18,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:18,993 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr38REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1765216397, now seen corresponding path program 1 times [2021-11-02 22:55:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:18,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1409128964] [2021-11-02 22:55:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:18,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:18,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:18,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:18,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:55:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:19,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:19,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:19,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:19,369 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:19,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1409128964] [2021-11-02 22:55:19,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1409128964] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:19,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:19,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 22:55:19,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8119938] [2021-11-02 22:55:19,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:19,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:19,371 INFO L87 Difference]: Start difference. First operand 1328 states and 1576 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:19,444 INFO L93 Difference]: Finished difference Result 1300 states and 1520 transitions. [2021-11-02 22:55:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:19,444 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:55:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:19,453 INFO L225 Difference]: With dead ends: 1300 [2021-11-02 22:55:19,453 INFO L226 Difference]: Without dead ends: 1300 [2021-11-02 22:55:19,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:55:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-11-02 22:55:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1298. [2021-11-02 22:55:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 805 states have (on average 1.8596273291925465) internal successors, (1497), 1287 states have internal predecessors, (1497), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1518 transitions. [2021-11-02 22:55:19,483 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1518 transitions. Word has length 24 [2021-11-02 22:55:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:19,484 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1518 transitions. [2021-11-02 22:55:19,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1518 transitions. [2021-11-02 22:55:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:55:19,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:19,490 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:19,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:19,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:19,703 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr52REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:19,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1075877825, now seen corresponding path program 1 times [2021-11-02 22:55:19,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:19,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989212075] [2021-11-02 22:55:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:19,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 22:55:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:19,999 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 [2021-11-02 22:55:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:20,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:20,324 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:20,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989212075] [2021-11-02 22:55:20,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989212075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:20,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:20,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:55:20,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789705735] [2021-11-02 22:55:20,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:20,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:20,326 INFO L87 Difference]: Start difference. First operand 1298 states and 1518 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:23,093 INFO L93 Difference]: Finished difference Result 1888 states and 2232 transitions. [2021-11-02 22:55:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:55:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-02 22:55:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:23,104 INFO L225 Difference]: With dead ends: 1888 [2021-11-02 22:55:23,104 INFO L226 Difference]: Without dead ends: 1888 [2021-11-02 22:55:23,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:23,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-11-02 22:55:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1294. [2021-11-02 22:55:23,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 805 states have (on average 1.8496894409937887) internal successors, (1489), 1283 states have internal predecessors, (1489), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1510 transitions. [2021-11-02 22:55:23,133 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1510 transitions. Word has length 38 [2021-11-02 22:55:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1510 transitions. [2021-11-02 22:55:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1510 transitions. [2021-11-02 22:55:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:55:23,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:23,136 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:23,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:23,349 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr53REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1075877826, now seen corresponding path program 1 times [2021-11-02 22:55:23,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:23,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623272135] [2021-11-02 22:55:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:23,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:23,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:23,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 22:55:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:23,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:55:23,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:23,683 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 [2021-11-02 22:55:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:24,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:24,546 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:24,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623272135] [2021-11-02 22:55:24,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623272135] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:24,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:24,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:55:24,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808990494] [2021-11-02 22:55:24,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:55:24,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:24,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:55:24,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:55:24,549 INFO L87 Difference]: Start difference. First operand 1294 states and 1510 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:32,213 INFO L93 Difference]: Finished difference Result 2013 states and 2334 transitions. [2021-11-02 22:55:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:55:32,214 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-02 22:55:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:32,222 INFO L225 Difference]: With dead ends: 2013 [2021-11-02 22:55:32,222 INFO L226 Difference]: Without dead ends: 2013 [2021-11-02 22:55:32,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:55:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-11-02 22:55:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1290. [2021-11-02 22:55:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 805 states have (on average 1.839751552795031) internal successors, (1481), 1279 states have internal predecessors, (1481), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1502 transitions. [2021-11-02 22:55:32,248 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1502 transitions. Word has length 38 [2021-11-02 22:55:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:32,249 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1502 transitions. [2021-11-02 22:55:32,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1502 transitions. [2021-11-02 22:55:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:55:32,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:32,250 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:32,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:32,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:32,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1047493696, now seen corresponding path program 1 times [2021-11-02 22:55:32,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:32,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413803040] [2021-11-02 22:55:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:32,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:32,465 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:32,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 22:55:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:55:32,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:32,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:33,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:33,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413803040] [2021-11-02 22:55:33,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413803040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:33,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:33,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:55:33,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5450005] [2021-11-02 22:55:33,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:55:33,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:55:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:55:33,136 INFO L87 Difference]: Start difference. First operand 1290 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:33,194 INFO L93 Difference]: Finished difference Result 1278 states and 1482 transitions. [2021-11-02 22:55:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:55:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-02 22:55:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:33,201 INFO L225 Difference]: With dead ends: 1278 [2021-11-02 22:55:33,201 INFO L226 Difference]: Without dead ends: 1278 [2021-11-02 22:55:33,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-02 22:55:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1278. [2021-11-02 22:55:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 793 states have (on average 1.8423707440100883) internal successors, (1461), 1267 states have internal predecessors, (1461), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1482 transitions. [2021-11-02 22:55:33,235 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1482 transitions. Word has length 56 [2021-11-02 22:55:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:33,235 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1482 transitions. [2021-11-02 22:55:33,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1482 transitions. [2021-11-02 22:55:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:55:33,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:33,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:33,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:33,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:33,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1905952116, now seen corresponding path program 1 times [2021-11-02 22:55:33,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:33,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903914709] [2021-11-02 22:55:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:33,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:33,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:33,453 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:33,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 22:55:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:34,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:55:34,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:34,089 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 [2021-11-02 22:55:34,094 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 [2021-11-02 22:55:34,885 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:55:34,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2021-11-02 22:55:34,908 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:55:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2021-11-02 22:55:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:34,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:40,024 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:40,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903914709] [2021-11-02 22:55:40,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903914709] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:40,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:40,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:55:40,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202449156] [2021-11-02 22:55:40,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:55:40,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:40,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:55:40,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-02 22:55:40,027 INFO L87 Difference]: Start difference. First operand 1278 states and 1482 transitions. Second operand has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:57,709 INFO L93 Difference]: Finished difference Result 2073 states and 2523 transitions. [2021-11-02 22:55:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:55:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-11-02 22:55:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:57,719 INFO L225 Difference]: With dead ends: 2073 [2021-11-02 22:55:57,720 INFO L226 Difference]: Without dead ends: 2073 [2021-11-02 22:55:57,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-02 22:55:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-02 22:55:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1240. [2021-11-02 22:55:57,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 793 states have (on average 1.794451450189155) internal successors, (1423), 1229 states have internal predecessors, (1423), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:55:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1444 transitions. [2021-11-02 22:55:57,745 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1444 transitions. Word has length 64 [2021-11-02 22:55:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:57,746 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1444 transitions. [2021-11-02 22:55:57,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1444 transitions. [2021-11-02 22:55:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:55:57,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:57,747 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:57,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:57,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:55:57,962 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr76REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:55:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash -655072709, now seen corresponding path program 1 times [2021-11-02 22:55:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:55:57,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042966239] [2021-11-02 22:55:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:57,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:55:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:55:57,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:55:58,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 22:55:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:55:58,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:58,619 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 [2021-11-02 22:55:58,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-02 22:55:58,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-02 22:55:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:58,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:55:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:58,825 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:55:58,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042966239] [2021-11-02 22:55:58,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042966239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:55:58,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:55:58,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:55:58,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36784605] [2021-11-02 22:55:58,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:55:58,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:55:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:55:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:55:58,827 INFO L87 Difference]: Start difference. First operand 1240 states and 1444 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:02,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:02,635 INFO L93 Difference]: Finished difference Result 1239 states and 1443 transitions. [2021-11-02 22:56:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:56:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-02 22:56:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:02,649 INFO L225 Difference]: With dead ends: 1239 [2021-11-02 22:56:02,649 INFO L226 Difference]: Without dead ends: 1239 [2021-11-02 22:56:02,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:56:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-11-02 22:56:02,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1239. [2021-11-02 22:56:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 793 states have (on average 1.7931904161412358) internal successors, (1422), 1228 states have internal predecessors, (1422), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:56:02,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1443 transitions. [2021-11-02 22:56:02,676 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1443 transitions. Word has length 69 [2021-11-02 22:56:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:02,688 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1443 transitions. [2021-11-02 22:56:02,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1443 transitions. [2021-11-02 22:56:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 22:56:02,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:02,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:02,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-02 22:56:02,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:02,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr77REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:02,904 INFO L85 PathProgramCache]: Analyzing trace with hash -655072708, now seen corresponding path program 1 times [2021-11-02 22:56:02,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:02,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757746614] [2021-11-02 22:56:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:02,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:02,907 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 22:56:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:03,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:56:03,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:03,603 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 [2021-11-02 22:56:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:56:03,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:56:03,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-02 22:56:03,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-02 22:56:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:03,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:04,179 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:04,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757746614] [2021-11-02 22:56:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757746614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:56:04,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:56:04,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 22:56:04,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836425570] [2021-11-02 22:56:04,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:56:04,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:56:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:56:04,181 INFO L87 Difference]: Start difference. First operand 1239 states and 1443 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:16,500 INFO L93 Difference]: Finished difference Result 1238 states and 1442 transitions. [2021-11-02 22:56:16,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:56:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-02 22:56:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:16,509 INFO L225 Difference]: With dead ends: 1238 [2021-11-02 22:56:16,509 INFO L226 Difference]: Without dead ends: 1238 [2021-11-02 22:56:16,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:56:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-11-02 22:56:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1238. [2021-11-02 22:56:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 792 states have (on average 1.7941919191919191) internal successors, (1421), 1227 states have internal predecessors, (1421), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-02 22:56:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1442 transitions. [2021-11-02 22:56:16,535 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1442 transitions. Word has length 69 [2021-11-02 22:56:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:16,536 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1442 transitions. [2021-11-02 22:56:16,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1442 transitions. [2021-11-02 22:56:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-02 22:56:16,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:16,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:16,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:16,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:16,753 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1548642594, now seen corresponding path program 1 times [2021-11-02 22:56:16,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:16,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637572112] [2021-11-02 22:56:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:16,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:16,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:16,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:16,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 22:56:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:56:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:17,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:17,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:17,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637572112] [2021-11-02 22:56:17,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [637572112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:56:17,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:56:17,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 22:56:17,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396304386] [2021-11-02 22:56:17,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:56:17,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:56:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:56:17,715 INFO L87 Difference]: Start difference. First operand 1238 states and 1442 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:17,845 INFO L93 Difference]: Finished difference Result 1248 states and 1455 transitions. [2021-11-02 22:56:17,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:56:17,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-02 22:56:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:17,857 INFO L225 Difference]: With dead ends: 1248 [2021-11-02 22:56:17,857 INFO L226 Difference]: Without dead ends: 1248 [2021-11-02 22:56:17,858 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:56:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-02 22:56:17,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2021-11-02 22:56:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 800 states have (on average 1.79125) internal successors, (1433), 1236 states have internal predecessors, (1433), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:56:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1455 transitions. [2021-11-02 22:56:17,886 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1455 transitions. Word has length 77 [2021-11-02 22:56:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:17,886 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1455 transitions. [2021-11-02 22:56:17,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1455 transitions. [2021-11-02 22:56:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 22:56:17,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:17,888 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:17,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:18,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:18,105 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash 107741602, now seen corresponding path program 1 times [2021-11-02 22:56:18,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:18,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422795785] [2021-11-02 22:56:18,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:18,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:18,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:18,108 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:18,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 22:56:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:18,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:56:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:19,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:19,378 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:19,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422795785] [2021-11-02 22:56:19,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422795785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:56:19,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:19,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 22:56:19,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676285250] [2021-11-02 22:56:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:56:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:56:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:56:19,380 INFO L87 Difference]: Start difference. First operand 1248 states and 1455 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:19,952 INFO L93 Difference]: Finished difference Result 1262 states and 1473 transitions. [2021-11-02 22:56:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:56:19,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-02 22:56:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:19,959 INFO L225 Difference]: With dead ends: 1262 [2021-11-02 22:56:19,959 INFO L226 Difference]: Without dead ends: 1258 [2021-11-02 22:56:19,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:56:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-02 22:56:19,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1254. [2021-11-02 22:56:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 806 states have (on average 1.7878411910669976) internal successors, (1441), 1242 states have internal predecessors, (1441), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:56:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1463 transitions. [2021-11-02 22:56:19,990 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1463 transitions. Word has length 79 [2021-11-02 22:56:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1463 transitions. [2021-11-02 22:56:19,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1463 transitions. [2021-11-02 22:56:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-02 22:56:19,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:19,992 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:20,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:20,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:20,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:20,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1478677154, now seen corresponding path program 2 times [2021-11-02 22:56:20,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:20,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [110355306] [2021-11-02 22:56:20,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:56:20,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:20,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:20,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:20,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 22:56:21,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:56:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:56:21,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:21,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:22,008 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:22,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [110355306] [2021-11-02 22:56:22,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [110355306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:56:22,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:22,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-02 22:56:22,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107007901] [2021-11-02 22:56:22,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:56:22,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:22,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:56:22,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:56:22,009 INFO L87 Difference]: Start difference. First operand 1254 states and 1463 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:23,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:23,848 INFO L93 Difference]: Finished difference Result 1282 states and 1501 transitions. [2021-11-02 22:56:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:56:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-02 22:56:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:23,853 INFO L225 Difference]: With dead ends: 1282 [2021-11-02 22:56:23,854 INFO L226 Difference]: Without dead ends: 1278 [2021-11-02 22:56:23,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 22:56:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-02 22:56:23,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1266. [2021-11-02 22:56:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 818 states have (on average 1.7811735941320292) internal successors, (1457), 1254 states have internal predecessors, (1457), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:56:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1479 transitions. [2021-11-02 22:56:23,890 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1479 transitions. Word has length 83 [2021-11-02 22:56:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1479 transitions. [2021-11-02 22:56:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1479 transitions. [2021-11-02 22:56:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-02 22:56:23,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:23,892 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:23,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:24,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:24,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:24,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:24,109 INFO L85 PathProgramCache]: Analyzing trace with hash 2053043362, now seen corresponding path program 3 times [2021-11-02 22:56:24,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:24,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754287638] [2021-11-02 22:56:24,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:56:24,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:24,110 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 22:56:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 22:56:25,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:25,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-02 22:56:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:26,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:27,802 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:27,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754287638] [2021-11-02 22:56:27,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754287638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:56:27,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:27,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-02 22:56:27,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485286732] [2021-11-02 22:56:27,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 22:56:27,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 22:56:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 22:56:27,809 INFO L87 Difference]: Start difference. First operand 1266 states and 1479 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:36,107 INFO L93 Difference]: Finished difference Result 1322 states and 1557 transitions. [2021-11-02 22:56:36,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-02 22:56:36,109 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 91 [2021-11-02 22:56:36,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:36,115 INFO L225 Difference]: With dead ends: 1322 [2021-11-02 22:56:36,115 INFO L226 Difference]: Without dead ends: 1318 [2021-11-02 22:56:36,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1817, Invalid=4189, Unknown=0, NotChecked=0, Total=6006 [2021-11-02 22:56:36,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-11-02 22:56:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1290. [2021-11-02 22:56:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 842 states have (on average 1.7684085510688836) internal successors, (1489), 1278 states have internal predecessors, (1489), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:56:36,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1511 transitions. [2021-11-02 22:56:36,144 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1511 transitions. Word has length 91 [2021-11-02 22:56:36,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:36,144 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1511 transitions. [2021-11-02 22:56:36,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:56:36,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1511 transitions. [2021-11-02 22:56:36,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-02 22:56:36,145 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:36,146 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:36,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:36,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:56:36,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:56:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:36,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1896954018, now seen corresponding path program 4 times [2021-11-02 22:56:36,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:56:36,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672856120] [2021-11-02 22:56:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:56:36,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:56:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:56:36,363 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:56:36,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 22:56:37,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:56:37,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:56:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 22:56:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:38,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:56:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:43,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:56:43,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672856120] [2021-11-02 22:56:43,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672856120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:56:43,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-02 22:56:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626936993] [2021-11-02 22:56:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-02 22:56:43,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:56:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-02 22:56:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-02 22:56:43,977 INFO L87 Difference]: Start difference. First operand 1290 states and 1511 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:57:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:01,477 INFO L93 Difference]: Finished difference Result 1384 states and 1633 transitions. [2021-11-02 22:57:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-02 22:57:01,479 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 107 [2021-11-02 22:57:01,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:01,483 INFO L225 Difference]: With dead ends: 1384 [2021-11-02 22:57:01,483 INFO L226 Difference]: Without dead ends: 1380 [2021-11-02 22:57:01,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4552, Invalid=14908, Unknown=0, NotChecked=0, Total=19460 [2021-11-02 22:57:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-11-02 22:57:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1320. [2021-11-02 22:57:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 872 states have (on average 1.760321100917431) internal successors, (1535), 1308 states have internal predecessors, (1535), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:57:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1557 transitions. [2021-11-02 22:57:01,518 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1557 transitions. Word has length 107 [2021-11-02 22:57:01,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:01,518 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1557 transitions. [2021-11-02 22:57:01,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-02 22:57:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1557 transitions. [2021-11-02 22:57:01,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-02 22:57:01,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:01,520 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:01,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:01,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:57:01,736 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-02 22:57:01,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1816175650, now seen corresponding path program 5 times [2021-11-02 22:57:01,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:57:01,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638224039] [2021-11-02 22:57:01,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:57:01,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:57:01,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:57:01,739 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:57:01,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04667c85-d6be-4903-8fdc-dd942bf243a2/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-02 22:57:03,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-02 22:57:03,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-02 22:57:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:03,710 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 [2021-11-02 22:57:04,001 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-02 22:57:04,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-02 22:57:04,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-02 22:57:04,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24