./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.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_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/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_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/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_239dc87e-3aba-4b8f-9fe3-5def50777e08/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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:02:28,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:02:28,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:02:28,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:02:28,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:02:28,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:02:28,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:02:28,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:02:28,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:02:28,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:02:28,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:02:28,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:02:28,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:02:28,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:02:28,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:02:28,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:02:28,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:02:28,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:02:28,355 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:02:28,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:02:28,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:02:28,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:02:28,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:02:28,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:02:28,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:02:28,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:02:28,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:02:28,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:02:28,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:02:28,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:02:28,376 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:02:28,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:02:28,379 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:02:28,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:02:28,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:02:28,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:02:28,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:02:28,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:02:28,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:02:28,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:02:28,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:02:28,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 23:02:28,416 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:02:28,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:02:28,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:02:28,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:02:28,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:02:28,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:02:28,420 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:02:28,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:02:28,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:02:28,421 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 23:02:28,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:02:28,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:02:28,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:02:28,423 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 23:02:28,423 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 23:02:28,424 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 23:02:28,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:02:28,424 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 23:02:28,425 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:02:28,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:02:28,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:02:28,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:02:28,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:02:28,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:02:28,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:02:28,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:02:28,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:02:28,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:02:28,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:02:28,429 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-02 23:02:28,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:02:28,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:02:28,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:02:28,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:02:28,777 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:02:28,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-02 23:02:28,868 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/ecb5a66e0/08dd5ac6844c4098a09b4cd99b5b8e33/FLAG9c322ead7 [2021-11-02 23:02:29,821 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:02:29,822 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-02 23:02:29,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/ecb5a66e0/08dd5ac6844c4098a09b4cd99b5b8e33/FLAG9c322ead7 [2021-11-02 23:02:29,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/ecb5a66e0/08dd5ac6844c4098a09b4cd99b5b8e33 [2021-11-02 23:02:29,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:02:29,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 23:02:29,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:02:29,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:02:29,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:02:29,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:02:29" (1/1) ... [2021-11-02 23:02:29,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63504fee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:29, skipping insertion in model container [2021-11-02 23:02:29,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:02:29" (1/1) ... [2021-11-02 23:02:29,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:02:29,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:02:30,635 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-02 23:02:31,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:02:31,039 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 23:02:31,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@632ef2f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:31, skipping insertion in model container [2021-11-02 23:02:31,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:02:31,042 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-02 23:02:31,045 INFO L168 Benchmark]: Toolchain (without parser) took 1156.60 ms. Allocated memory is still 136.3 MB. Free memory was 98.1 MB in the beginning and 92.5 MB in the end (delta: 5.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 23:02:31,047 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory is still 118.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 23:02:31,049 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1152.99 ms. Allocated memory is still 136.3 MB. Free memory was 97.9 MB in the beginning and 92.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 23:02:31,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 136.3 MB. Free memory is still 118.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1152.99 ms. Allocated memory is still 136.3 MB. Free memory was 97.9 MB in the beginning and 92.5 MB in the end (delta: 5.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/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_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/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_239dc87e-3aba-4b8f-9fe3-5def50777e08/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 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:02:33,899 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:02:33,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:02:33,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:02:33,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:02:33,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:02:33,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:02:33,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:02:33,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:02:33,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:02:33,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:02:33,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:02:33,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:02:33,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:02:33,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:02:33,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:02:33,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:02:33,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:02:33,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:02:33,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:02:33,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:02:34,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:02:34,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:02:34,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:02:34,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:02:34,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:02:34,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:02:34,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:02:34,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:02:34,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:02:34,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:02:34,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:02:34,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:02:34,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:02:34,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:02:34,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:02:34,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:02:34,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:02:34,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:02:34,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:02:34,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:02:34,040 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 23:02:34,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:02:34,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:02:34,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:02:34,098 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:02:34,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:02:34,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:02:34,101 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:02:34,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:02:34,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:02:34,102 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 23:02:34,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:02:34,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:02:34,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:02:34,104 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 23:02:34,105 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 23:02:34,105 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 23:02:34,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:02:34,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 23:02:34,106 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 23:02:34,106 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 23:02:34,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:02:34,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:02:34,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:02:34,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:02:34,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:02:34,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:02:34,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:02:34,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:02:34,110 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 23:02:34,110 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 23:02:34,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:02:34,110 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 23:02:34,111 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-02 23:02:34,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:02:34,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:02:34,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:02:34,640 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:02:34,641 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:02:34,642 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-02 23:02:34,721 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/2ca39358a/31a9053b45524577b0e3ed32863ab541/FLAG362af1474 [2021-11-02 23:02:35,609 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:02:35,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-02 23:02:35,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/2ca39358a/31a9053b45524577b0e3ed32863ab541/FLAG362af1474 [2021-11-02 23:02:35,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/data/2ca39358a/31a9053b45524577b0e3ed32863ab541 [2021-11-02 23:02:35,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:02:35,655 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 23:02:35,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:02:35,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:02:35,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:02:35,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:02:35" (1/1) ... [2021-11-02 23:02:35,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e54d278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:35, skipping insertion in model container [2021-11-02 23:02:35,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:02:35" (1/1) ... [2021-11-02 23:02:35,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:02:35,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:02:36,420 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-02 23:02:36,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:02:36,868 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-02 23:02:36,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:02:36,976 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-02 23:02:37,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:02:37,198 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:02:37,238 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_239dc87e-3aba-4b8f-9fe3-5def50777e08/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-02 23:02:37,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:02:37,508 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:02:37,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37 WrapperNode [2021-11-02 23:02:37,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:02:37,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:02:37,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:02:37,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:02:37,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:02:37,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:02:37,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:02:37,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:02:37,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (1/1) ... [2021-11-02 23:02:37,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:02:37,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:02:37,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:02:37,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:02:38,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 23:02:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:02:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 23:02:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 23:02:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 23:02:38,014 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 23:02:38,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 23:02:38,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 23:02:38,015 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 23:02:38,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-02 23:02:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-02 23:02:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 23:02:38,016 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-02 23:02:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-02 23:02:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-02 23:02:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-02 23:02:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-02 23:02:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 23:02:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-02 23:02:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-02 23:02:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-02 23:02:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-02 23:02:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-02 23:02:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-02 23:02:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-02 23:02:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-02 23:02:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-02 23:02:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-02 23:02:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-02 23:02:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-02 23:02:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-02 23:02:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-02 23:02:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-02 23:02:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-02 23:02:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-02 23:02:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-02 23:02:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-02 23:02:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-02 23:02:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-02 23:02:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-02 23:02:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-02 23:02:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-02 23:02:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-02 23:02:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-02 23:02:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-02 23:02:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-02 23:02:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-02 23:02:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-02 23:02:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-02 23:02:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-02 23:02:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-02 23:02:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-02 23:02:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-02 23:02:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-02 23:02:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-02 23:02:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-02 23:02:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-02 23:02:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-02 23:02:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-02 23:02:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 23:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 23:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 23:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 23:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 23:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 23:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 23:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 23:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 23:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 23:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 23:02:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 23:02:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 23:02:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 23:02:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 23:02:38,029 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 23:02:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 23:02:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 23:02:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 23:02:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 23:02:38,030 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 23:02:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 23:02:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 23:02:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 23:02:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 23:02:38,031 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 23:02:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 23:02:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 23:02:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 23:02:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 23:02:38,032 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 23:02:38,033 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 23:02:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 23:02:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 23:02:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 23:02:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 23:02:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 23:02:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 23:02:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 23:02:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 23:02:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 23:02:38,036 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 23:02:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 23:02:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 23:02:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 23:02:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 23:02:38,037 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 23:02:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 23:02:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 23:02:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 23:02:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 23:02:38,038 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 23:02:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 23:02:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 23:02:38,039 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 23:02:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 23:02:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 23:02:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 23:02:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 23:02:38,040 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 23:02:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 23:02:38,041 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 23:02:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 23:02:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 23:02:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 23:02:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 23:02:38,042 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 23:02:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 23:02:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 23:02:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 23:02:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 23:02:38,043 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 23:02:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 23:02:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 23:02:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 23:02:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 23:02:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 23:02:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 23:02:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 23:02:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 23:02:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 23:02:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 23:02:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 23:02:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 23:02:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 23:02:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 23:02:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 23:02:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 23:02:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 23:02:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 23:02:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 23:02:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 23:02:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 23:02:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 23:02:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 23:02:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 23:02:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:02:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-02 23:02:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-02 23:02:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 23:02:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:02:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 23:02:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 23:02:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 23:02:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:02:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:02:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-02 23:02:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:02:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 23:02:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 23:02:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:02:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 23:02:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 23:02:38,845 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-02 23:02:51,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:02:51,811 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-02 23:02:51,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:02:51 BoogieIcfgContainer [2021-11-02 23:02:51,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:02:51,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:02:51,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:02:51,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:02:51,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:02:35" (1/3) ... [2021-11-02 23:02:51,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4a64ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:02:51, skipping insertion in model container [2021-11-02 23:02:51,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:02:37" (2/3) ... [2021-11-02 23:02:51,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4a64ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:02:51, skipping insertion in model container [2021-11-02 23:02:51,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:02:51" (3/3) ... [2021-11-02 23:02:51,849 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2021-11-02 23:02:51,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:02:51,860 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-11-02 23:02:51,936 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:02:51,949 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 23:02:51,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-11-02 23:02:52,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-02 23:02:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 23:02:52,063 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:52,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:52,064 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:02:52,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007294, now seen corresponding path program 1 times [2021-11-02 23:02:52,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:52,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780782096] [2021-11-02 23:02:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:52,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:52,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:52,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 23:02:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:02:52,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:02:52,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:02:52,658 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 23:02:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:02:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:52,731 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 23:02:52,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:02:52,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780782096] [2021-11-02 23:02:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780782096] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:02:52,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:02:52,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 23:02:52,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048797560] [2021-11-02 23:02:52,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:02:52,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:02:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:02:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:02:52,774 INFO L87 Difference]: Start difference. First operand has 2442 states, 1233 states have (on average 2.227088402270884) internal successors, (2746), 2424 states have internal predecessors, (2746), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) 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 23:02:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:02:59,174 INFO L93 Difference]: Finished difference Result 3286 states and 3488 transitions. [2021-11-02 23:02:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:02:59,178 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 23:02:59,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:02:59,239 INFO L225 Difference]: With dead ends: 3286 [2021-11-02 23:02:59,242 INFO L226 Difference]: Without dead ends: 3283 [2021-11-02 23:02:59,245 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 23:02:59,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-02 23:02:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2583. [2021-11-02 23:02:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2583 states, 1399 states have (on average 2.0664760543245175) internal successors, (2891), 2564 states have internal predecessors, (2891), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:02:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 2926 transitions. [2021-11-02 23:02:59,535 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 2926 transitions. Word has length 7 [2021-11-02 23:02:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:02:59,537 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 2926 transitions. [2021-11-02 23:02:59,544 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 23:02:59,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 2926 transitions. [2021-11-02 23:02:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 23:02:59,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:02:59,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:02:59,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:02:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:02:59,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:02:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:02:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007293, now seen corresponding path program 1 times [2021-11-02 23:02:59,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:02:59,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251372478] [2021-11-02 23:02:59,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:02:59,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:02:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:02:59,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:02:59,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 23:03:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:00,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:00,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:00,128 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 23:03:00,150 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 23:03:00,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:00,260 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 23:03:00,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:00,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251372478] [2021-11-02 23:03:00,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251372478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:00,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:00,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 23:03:00,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939011265] [2021-11-02 23:03:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:00,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:00,265 INFO L87 Difference]: Start difference. First operand 2583 states and 2926 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 23:03:14,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:14,248 INFO L93 Difference]: Finished difference Result 4061 states and 4523 transitions. [2021-11-02 23:03:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:14,249 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 23:03:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:14,275 INFO L225 Difference]: With dead ends: 4061 [2021-11-02 23:03:14,275 INFO L226 Difference]: Without dead ends: 4061 [2021-11-02 23:03:14,276 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 23:03:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-02 23:03:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2747. [2021-11-02 23:03:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 1575 states have (on average 2.0526984126984127) internal successors, (3233), 2728 states have internal predecessors, (3233), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3268 transitions. [2021-11-02 23:03:14,368 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3268 transitions. Word has length 7 [2021-11-02 23:03:14,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:14,368 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3268 transitions. [2021-11-02 23:03:14,369 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 23:03:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3268 transitions. [2021-11-02 23:03:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:03:14,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:14,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:14,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-02 23:03:14,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:14,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 515316259, now seen corresponding path program 1 times [2021-11-02 23:03:14,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:14,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252775676] [2021-11-02 23:03:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:14,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:14,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:14,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:14,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 23:03:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:14,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:03:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:14,925 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 23:03:14,946 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 23:03:14,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:14,992 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 23:03:14,993 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:14,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252775676] [2021-11-02 23:03:14,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252775676] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:14,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:14,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 23:03:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627776799] [2021-11-02 23:03:15,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:03:15,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:15,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:03:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:03:15,004 INFO L87 Difference]: Start difference. First operand 2747 states and 3268 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 23:03:20,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:20,069 INFO L93 Difference]: Finished difference Result 3485 states and 4006 transitions. [2021-11-02 23:03:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:20,070 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 23:03:20,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:20,093 INFO L225 Difference]: With dead ends: 3485 [2021-11-02 23:03:20,093 INFO L226 Difference]: Without dead ends: 3485 [2021-11-02 23:03:20,094 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 23:03:20,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-11-02 23:03:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2656. [2021-11-02 23:03:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2656 states, 1575 states have (on average 1.9733333333333334) internal successors, (3108), 2637 states have internal predecessors, (3108), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3143 transitions. [2021-11-02 23:03:20,183 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3143 transitions. Word has length 12 [2021-11-02 23:03:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:20,184 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3143 transitions. [2021-11-02 23:03:20,184 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 23:03:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3143 transitions. [2021-11-02 23:03:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:03:20,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:20,185 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:20,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:20,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:20,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash 515316260, now seen corresponding path program 1 times [2021-11-02 23:03:20,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:20,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451590435] [2021-11-02 23:03:20,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:20,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:20,403 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:20,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 23:03:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:20,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:20,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:20,741 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 23:03:20,799 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 23:03:20,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:20,942 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 23:03:20,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451590435] [2021-11-02 23:03:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451590435] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:20,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:20,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 23:03:20,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848451472] [2021-11-02 23:03:20,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:20,945 INFO L87 Difference]: Start difference. First operand 2656 states and 3143 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 23:03:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:34,233 INFO L93 Difference]: Finished difference Result 3611 states and 4034 transitions. [2021-11-02 23:03:34,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:34,234 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 23:03:34,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:34,256 INFO L225 Difference]: With dead ends: 3611 [2021-11-02 23:03:34,256 INFO L226 Difference]: Without dead ends: 3611 [2021-11-02 23:03:34,257 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 23:03:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-02 23:03:34,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2648. [2021-11-02 23:03:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1577 states have (on average 1.9581483830057071) internal successors, (3088), 2629 states have internal predecessors, (3088), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3123 transitions. [2021-11-02 23:03:34,338 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3123 transitions. Word has length 12 [2021-11-02 23:03:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 3123 transitions. [2021-11-02 23:03:34,339 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 23:03:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3123 transitions. [2021-11-02 23:03:34,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:03:34,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:34,341 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:03:34,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:34,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:34,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr658REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:34,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1098922193, now seen corresponding path program 1 times [2021-11-02 23:03:34,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:34,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915665845] [2021-11-02 23:03:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:34,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:34,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:34,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:34,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 23:03:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:34,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:03:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:34,866 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 23:03:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:34,925 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 23:03:34,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:34,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915665845] [2021-11-02 23:03:34,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915665845] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:34,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:34,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:03:34,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979924506] [2021-11-02 23:03:34,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:34,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:34,929 INFO L87 Difference]: Start difference. First operand 2648 states and 3123 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 23:03:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:34,999 INFO L93 Difference]: Finished difference Result 2606 states and 3080 transitions. [2021-11-02 23:03:35,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:35,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 23:03:35,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:35,017 INFO L225 Difference]: With dead ends: 2606 [2021-11-02 23:03:35,017 INFO L226 Difference]: Without dead ends: 2606 [2021-11-02 23:03:35,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 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 23:03:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-02 23:03:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2606. [2021-11-02 23:03:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 1559 states have (on average 1.9531751122514431) internal successors, (3045), 2587 states have internal predecessors, (3045), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3080 transitions. [2021-11-02 23:03:35,089 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3080 transitions. Word has length 15 [2021-11-02 23:03:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:35,090 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3080 transitions. [2021-11-02 23:03:35,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 23:03:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3080 transitions. [2021-11-02 23:03:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:03:35,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:35,091 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 23:03:35,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:35,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:35,307 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr682REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -497671989, now seen corresponding path program 1 times [2021-11-02 23:03:35,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:35,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473702404] [2021-11-02 23:03:35,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:35,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:35,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:35,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:35,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 23:03:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:35,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:35,709 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 23:03:35,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:35,768 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 23:03:35,769 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:35,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473702404] [2021-11-02 23:03:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473702404] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:35,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:03:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692674518] [2021-11-02 23:03:35,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:03:35,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:03:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:03:35,771 INFO L87 Difference]: Start difference. First operand 2606 states and 3080 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 23:03:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:35,885 INFO L93 Difference]: Finished difference Result 2585 states and 3052 transitions. [2021-11-02 23:03:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 23:03:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:35,903 INFO L225 Difference]: With dead ends: 2585 [2021-11-02 23:03:35,903 INFO L226 Difference]: Without dead ends: 2585 [2021-11-02 23:03:35,904 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 23:03:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-02 23:03:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2584. [2021-11-02 23:03:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 1551 states have (on average 1.9445519019987105) internal successors, (3016), 2565 states have internal predecessors, (3016), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:35,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3051 transitions. [2021-11-02 23:03:35,976 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3051 transitions. Word has length 17 [2021-11-02 23:03:35,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:35,976 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 3051 transitions. [2021-11-02 23:03:35,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 23:03:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3051 transitions. [2021-11-02 23:03:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:03:35,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:35,978 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 23:03:36,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:36,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:36,192 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr334REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash -2032047504, now seen corresponding path program 1 times [2021-11-02 23:03:36,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:36,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1291803566] [2021-11-02 23:03:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:36,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:36,196 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:36,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 23:03:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:36,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:03:36,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:36,615 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 23:03:36,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:36,678 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 23:03:36,678 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:36,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1291803566] [2021-11-02 23:03:36,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1291803566] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:36,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:36,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:03:36,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790091878] [2021-11-02 23:03:36,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:36,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:36,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:36,682 INFO L87 Difference]: Start difference. First operand 2584 states and 3051 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:36,779 INFO L93 Difference]: Finished difference Result 4195 states and 4766 transitions. [2021-11-02 23:03:36,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:36,805 INFO L225 Difference]: With dead ends: 4195 [2021-11-02 23:03:36,806 INFO L226 Difference]: Without dead ends: 4195 [2021-11-02 23:03:36,806 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 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 23:03:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-02 23:03:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2506. [2021-11-02 23:03:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2506 states, 1497 states have (on average 1.9285237140948563) internal successors, (2887), 2487 states have internal predecessors, (2887), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 2922 transitions. [2021-11-02 23:03:36,885 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 2922 transitions. Word has length 24 [2021-11-02 23:03:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:36,885 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 2922 transitions. [2021-11-02 23:03:36,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 2922 transitions. [2021-11-02 23:03:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:03:36,887 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:36,887 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 23:03:36,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 23:03:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:37,104 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2117616112, now seen corresponding path program 1 times [2021-11-02 23:03:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713596141] [2021-11-02 23:03:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:37,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:37,108 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:37,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 23:03:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:37,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 23:03:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:37,530 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 23:03:37,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:03:37,598 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:37,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713596141] [2021-11-02 23:03:37,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713596141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:37,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:37,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 23:03:37,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230600405] [2021-11-02 23:03:37,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:37,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:37,602 INFO L87 Difference]: Start difference. First operand 2506 states and 2922 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:37,671 INFO L93 Difference]: Finished difference Result 4118 states and 4689 transitions. [2021-11-02 23:03:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:03:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:37,692 INFO L225 Difference]: With dead ends: 4118 [2021-11-02 23:03:37,692 INFO L226 Difference]: Without dead ends: 4118 [2021-11-02 23:03:37,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 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 23:03:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-11-02 23:03:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2464. [2021-11-02 23:03:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 1479 states have (on average 1.922920892494929) internal successors, (2844), 2445 states have internal predecessors, (2844), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2879 transitions. [2021-11-02 23:03:37,765 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2879 transitions. Word has length 24 [2021-11-02 23:03:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:37,766 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 2879 transitions. [2021-11-02 23:03:37,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 23:03:37,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2879 transitions. [2021-11-02 23:03:37,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:37,768 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:37,768 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] [2021-11-02 23:03:37,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:37,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:37,985 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr358REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1412495274, now seen corresponding path program 1 times [2021-11-02 23:03:37,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:37,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115754983] [2021-11-02 23:03:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:37,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:37,987 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:37,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 23:03:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:38,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:38,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:38,472 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 23:03:38,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:38,558 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 23:03:38,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:38,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115754983] [2021-11-02 23:03:38,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115754983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:38,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:03:38,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060055890] [2021-11-02 23:03:38,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:03:38,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:38,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:03:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:03:38,563 INFO L87 Difference]: Start difference. First operand 2464 states and 2879 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 23:03:38,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:38,741 INFO L93 Difference]: Finished difference Result 4076 states and 4596 transitions. [2021-11-02 23:03:38,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:38,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-02 23:03:38,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:38,760 INFO L225 Difference]: With dead ends: 4076 [2021-11-02 23:03:38,760 INFO L226 Difference]: Without dead ends: 4076 [2021-11-02 23:03:38,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 23:03:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-02 23:03:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2426. [2021-11-02 23:03:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1455 states have (on average 1.8948453608247422) internal successors, (2757), 2407 states have internal predecessors, (2757), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2792 transitions. [2021-11-02 23:03:38,835 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2792 transitions. Word has length 26 [2021-11-02 23:03:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:38,836 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2792 transitions. [2021-11-02 23:03:38,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 23:03:38,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2792 transitions. [2021-11-02 23:03:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:03:38,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:38,838 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] [2021-11-02 23:03:38,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:39,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:39,055 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr40REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:39,055 INFO L85 PathProgramCache]: Analyzing trace with hash -785415766, now seen corresponding path program 1 times [2021-11-02 23:03:39,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:39,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171163759] [2021-11-02 23:03:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:39,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:39,058 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:39,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 23:03:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:39,733 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 23:03:39,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:39,853 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 23:03:39,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:39,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171163759] [2021-11-02 23:03:39,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171163759] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:39,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:39,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 23:03:39,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099789456] [2021-11-02 23:03:39,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:03:39,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:39,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:03:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:03:39,872 INFO L87 Difference]: Start difference. First operand 2426 states and 2792 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 23:03:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:40,149 INFO L93 Difference]: Finished difference Result 4037 states and 4545 transitions. [2021-11-02 23:03:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 26 [2021-11-02 23:03:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:40,187 INFO L225 Difference]: With dead ends: 4037 [2021-11-02 23:03:40,191 INFO L226 Difference]: Without dead ends: 4037 [2021-11-02 23:03:40,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 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 23:03:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-11-02 23:03:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 2404. [2021-11-02 23:03:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 1447 states have (on average 1.8852798894263993) internal successors, (2728), 2385 states have internal predecessors, (2728), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 2763 transitions. [2021-11-02 23:03:40,371 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 2763 transitions. Word has length 26 [2021-11-02 23:03:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:40,372 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 2763 transitions. [2021-11-02 23:03:40,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 23:03:40,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 2763 transitions. [2021-11-02 23:03:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:03:40,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:40,382 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] [2021-11-02 23:03:40,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:40,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:40,598 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr696REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash -253561191, now seen corresponding path program 1 times [2021-11-02 23:03:40,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:40,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057373959] [2021-11-02 23:03:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:40,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:40,612 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:40,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-02 23:03:41,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:03:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:41,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:03:41,228 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 23:03:41,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:41,398 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 23:03:41,398 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:41,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057373959] [2021-11-02 23:03:41,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057373959] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:41,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:41,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:03:41,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593321809] [2021-11-02 23:03:41,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:03:41,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:03:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:03:41,401 INFO L87 Difference]: Start difference. First operand 2404 states and 2763 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 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 23:03:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:03:46,913 INFO L93 Difference]: Finished difference Result 3025 states and 3303 transitions. [2021-11-02 23:03:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:03:46,914 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 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 31 [2021-11-02 23:03:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:03:46,919 INFO L225 Difference]: With dead ends: 3025 [2021-11-02 23:03:46,920 INFO L226 Difference]: Without dead ends: 3025 [2021-11-02 23:03:46,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 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 23:03:46,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-11-02 23:03:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2400. [2021-11-02 23:03:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1447 states have (on average 1.8825155494125778) internal successors, (2724), 2381 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:03:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2759 transitions. [2021-11-02 23:03:46,973 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2759 transitions. Word has length 31 [2021-11-02 23:03:46,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:03:46,974 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 2759 transitions. [2021-11-02 23:03:46,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 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 23:03:46,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2759 transitions. [2021-11-02 23:03:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:03:46,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:03:46,976 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] [2021-11-02 23:03:46,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:03:47,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:03:47,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr697REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:03:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:03:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash -253561190, now seen corresponding path program 1 times [2021-11-02 23:03:47,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:03:47,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959182115] [2021-11-02 23:03:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:03:47,200 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:03:47,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:03:47,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:03:47,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-02 23:03:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:03:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:03:47,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:03:47,658 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 23:03:48,002 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 23:03:48,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:03:48,615 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 23:03:48,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:48,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959182115] [2021-11-02 23:03:48,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959182115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:03:48,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:03:48,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 23:03:48,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789448409] [2021-11-02 23:03:48,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:03:48,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:03:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:03:48,617 INFO L87 Difference]: Start difference. First operand 2400 states and 2759 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 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 23:04:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:09,420 INFO L93 Difference]: Finished difference Result 3575 states and 3928 transitions. [2021-11-02 23:04:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:04:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 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 31 [2021-11-02 23:04:09,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:09,430 INFO L225 Difference]: With dead ends: 3575 [2021-11-02 23:04:09,431 INFO L226 Difference]: Without dead ends: 3575 [2021-11-02 23:04:09,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-02 23:04:09,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2433. [2021-11-02 23:04:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 1481 states have (on average 1.8642808912896691) internal successors, (2761), 2414 states have internal predecessors, (2761), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:04:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 2796 transitions. [2021-11-02 23:04:09,484 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 2796 transitions. Word has length 31 [2021-11-02 23:04:09,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:09,485 INFO L470 AbstractCegarLoop]: Abstraction has 2433 states and 2796 transitions. [2021-11-02 23:04:09,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 6 states have internal predecessors, (54), 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 23:04:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 2796 transitions. [2021-11-02 23:04:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:04:09,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:09,487 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] [2021-11-02 23:04:09,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:09,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:04:09,703 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr372REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:04:09,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 926454328, now seen corresponding path program 1 times [2021-11-02 23:04:09,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:04:09,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145463620] [2021-11-02 23:04:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:09,708 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:04:09,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:04:09,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:04:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-02 23:04:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:04:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:10,230 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 23:04:10,404 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 23:04:10,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:04:10,590 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 23:04:10,591 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:04:10,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145463620] [2021-11-02 23:04:10,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145463620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:10,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:10,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:04:10,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529440654] [2021-11-02 23:04:10,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:10,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:04:10,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:10,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:10,593 INFO L87 Difference]: Start difference. First operand 2433 states and 2796 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 23:04:19,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:19,036 INFO L93 Difference]: Finished difference Result 5058 states and 5640 transitions. [2021-11-02 23:04:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 40 [2021-11-02 23:04:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:19,048 INFO L225 Difference]: With dead ends: 5058 [2021-11-02 23:04:19,049 INFO L226 Difference]: Without dead ends: 5058 [2021-11-02 23:04:19,049 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 23:04:19,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2021-11-02 23:04:19,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 2430. [2021-11-02 23:04:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8568534773801486) internal successors, (2750), 2411 states have internal predecessors, (2750), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:04:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2785 transitions. [2021-11-02 23:04:19,104 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2785 transitions. Word has length 40 [2021-11-02 23:04:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:19,105 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2785 transitions. [2021-11-02 23:04:19,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 23:04:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2785 transitions. [2021-11-02 23:04:19,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:04:19,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:19,107 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] [2021-11-02 23:04:19,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:19,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:04:19,322 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr373REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:04:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:19,323 INFO L85 PathProgramCache]: Analyzing trace with hash 926454329, now seen corresponding path program 1 times [2021-11-02 23:04:19,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:04:19,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068756912] [2021-11-02 23:04:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:19,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:04:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:04:19,325 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:04:19,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-02 23:04:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:04:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:19,876 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 23:04:20,237 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 23:04:20,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:04:20,802 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 23:04:20,803 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:04:20,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068756912] [2021-11-02 23:04:20,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068756912] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:20,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:20,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 23:04:20,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744950909] [2021-11-02 23:04:20,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:04:20,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:04:20,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:04:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:20,805 INFO L87 Difference]: Start difference. First operand 2430 states and 2785 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 23:04:41,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:41,921 INFO L93 Difference]: Finished difference Result 5190 states and 5720 transitions. [2021-11-02 23:04:41,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:04:41,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 40 [2021-11-02 23:04:41,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:41,932 INFO L225 Difference]: With dead ends: 5190 [2021-11-02 23:04:41,933 INFO L226 Difference]: Without dead ends: 5190 [2021-11-02 23:04:41,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:04:41,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-11-02 23:04:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 2430. [2021-11-02 23:04:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 1481 states have (on average 1.8541525995948682) internal successors, (2746), 2411 states have internal predecessors, (2746), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:04:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2781 transitions. [2021-11-02 23:04:41,985 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2781 transitions. Word has length 40 [2021-11-02 23:04:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:41,986 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2781 transitions. [2021-11-02 23:04:41,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 23:04:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2781 transitions. [2021-11-02 23:04:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:04:41,987 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:41,987 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] [2021-11-02 23:04:42,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:42,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:04:42,200 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr54REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:04:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930120, now seen corresponding path program 1 times [2021-11-02 23:04:42,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:04:42,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1500983018] [2021-11-02 23:04:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:42,202 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:04:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:04:42,203 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:04:42,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-02 23:04:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:42,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:04:42,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:42,688 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 23:04:42,846 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 23:04:42,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:04:43,039 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 23:04:43,040 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:04:43,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1500983018] [2021-11-02 23:04:43,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1500983018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:43,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:43,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:04:43,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981004461] [2021-11-02 23:04:43,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:04:43,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:04:43,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:04:43,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:04:43,042 INFO L87 Difference]: Start difference. First operand 2430 states and 2781 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 23:04:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:04:50,653 INFO L93 Difference]: Finished difference Result 4671 states and 5229 transitions. [2021-11-02 23:04:50,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:04:50,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 40 [2021-11-02 23:04:50,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:04:50,661 INFO L225 Difference]: With dead ends: 4671 [2021-11-02 23:04:50,661 INFO L226 Difference]: Without dead ends: 4671 [2021-11-02 23:04:50,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 77 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 23:04:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-11-02 23:04:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 2426. [2021-11-02 23:04:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 1481 states have (on average 1.851451721809588) internal successors, (2742), 2407 states have internal predecessors, (2742), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:04:50,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2777 transitions. [2021-11-02 23:04:50,714 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2777 transitions. Word has length 40 [2021-11-02 23:04:50,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:04:50,714 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2777 transitions. [2021-11-02 23:04:50,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 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 23:04:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2777 transitions. [2021-11-02 23:04:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:04:50,716 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:04:50,716 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] [2021-11-02 23:04:50,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:04:50,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:04:50,930 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr55REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:04:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:04:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930119, now seen corresponding path program 1 times [2021-11-02 23:04:50,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:04:50,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990081962] [2021-11-02 23:04:50,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:04:50,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:04:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:04:50,933 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:04:50,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-02 23:04:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:04:51,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:04:51,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:04:51,439 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 23:04:51,776 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 23:04:51,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:04:52,369 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 23:04:52,370 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:04:52,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990081962] [2021-11-02 23:04:52,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990081962] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:04:52,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:04:52,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 23:04:52,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775443458] [2021-11-02 23:04:52,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:04:52,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:04:52,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:04:52,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:04:52,372 INFO L87 Difference]: Start difference. First operand 2426 states and 2777 transitions. Second operand has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 23:05:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:15,103 INFO L93 Difference]: Finished difference Result 4579 states and 5017 transitions. [2021-11-02 23:05:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:05:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 40 [2021-11-02 23:05:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:15,110 INFO L225 Difference]: With dead ends: 4579 [2021-11-02 23:05:15,110 INFO L226 Difference]: Without dead ends: 4579 [2021-11-02 23:05:15,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:05:15,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-02 23:05:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2422. [2021-11-02 23:05:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 1481 states have (on average 1.848750844024308) internal successors, (2738), 2403 states have internal predecessors, (2738), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:05:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2773 transitions. [2021-11-02 23:05:15,158 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2773 transitions. Word has length 40 [2021-11-02 23:05:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2773 transitions. [2021-11-02 23:05:15,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.8) internal successors, (69), 6 states have internal predecessors, (69), 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 23:05:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2773 transitions. [2021-11-02 23:05:15,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:05:15,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:15,160 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] [2021-11-02 23:05:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:15,385 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:15,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:15,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1617899872, now seen corresponding path program 1 times [2021-11-02 23:05:15,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:15,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225339752] [2021-11-02 23:05:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:15,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:15,388 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:15,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-02 23:05:15,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:15,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:15,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:15,976 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 23:05:15,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:16,110 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 23:05:16,111 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:16,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225339752] [2021-11-02 23:05:16,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225339752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:16,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:16,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:05:16,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628040298] [2021-11-02 23:05:16,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:16,113 INFO L87 Difference]: Start difference. First operand 2422 states and 2773 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 23:05:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:16,179 INFO L93 Difference]: Finished difference Result 2416 states and 2759 transitions. [2021-11-02 23:05:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 44 [2021-11-02 23:05:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:16,183 INFO L225 Difference]: With dead ends: 2416 [2021-11-02 23:05:16,183 INFO L226 Difference]: Without dead ends: 2416 [2021-11-02 23:05:16,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 85 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 23:05:16,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-02 23:05:16,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-02 23:05:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1475 states have (on average 1.8467796610169491) internal successors, (2724), 2397 states have internal predecessors, (2724), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (17), 14 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-02 23:05:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2759 transitions. [2021-11-02 23:05:16,225 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2759 transitions. Word has length 44 [2021-11-02 23:05:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:16,226 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 2759 transitions. [2021-11-02 23:05:16,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 23:05:16,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2759 transitions. [2021-11-02 23:05:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:05:16,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:16,228 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] [2021-11-02 23:05:16,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:16,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:16,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:16,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash -357192108, now seen corresponding path program 1 times [2021-11-02 23:05:16,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:16,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449530507] [2021-11-02 23:05:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:16,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:16,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:16,450 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:16,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-02 23:05:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:17,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:17,495 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 23:05:17,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:17,944 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 23:05:17,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:17,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449530507] [2021-11-02 23:05:17,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449530507] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:17,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:17,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:05:17,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774937460] [2021-11-02 23:05:17,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:17,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:17,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:17,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:17,946 INFO L87 Difference]: Start difference. First operand 2416 states and 2759 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 23:05:18,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:18,308 INFO L93 Difference]: Finished difference Result 3934 states and 4411 transitions. [2021-11-02 23:05:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:18,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 52 [2021-11-02 23:05:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:18,313 INFO L225 Difference]: With dead ends: 3934 [2021-11-02 23:05:18,313 INFO L226 Difference]: Without dead ends: 3934 [2021-11-02 23:05:18,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 23:05:18,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-11-02 23:05:18,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3135. [2021-11-02 23:05:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 2190 states have (on average 1.8136986301369864) internal successors, (3972), 3109 states have internal predecessors, (3972), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 23:05:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4021 transitions. [2021-11-02 23:05:18,371 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4021 transitions. Word has length 52 [2021-11-02 23:05:18,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:18,371 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 4021 transitions. [2021-11-02 23:05:18,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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 23:05:18,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4021 transitions. [2021-11-02 23:05:18,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:05:18,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:18,373 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] [2021-11-02 23:05:18,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:18,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:18,587 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -964579511, now seen corresponding path program 1 times [2021-11-02 23:05:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:18,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247089711] [2021-11-02 23:05:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:18,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:18,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:18,596 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:18,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-02 23:05:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:19,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:19,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:19,766 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 23:05:19,766 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:19,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247089711] [2021-11-02 23:05:19,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247089711] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:19,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:19,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:05:19,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003782196] [2021-11-02 23:05:19,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:19,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:19,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:19,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:19,768 INFO L87 Difference]: Start difference. First operand 3135 states and 4021 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 23:05:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:19,851 INFO L93 Difference]: Finished difference Result 4463 states and 5423 transitions. [2021-11-02 23:05:19,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:19,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 55 [2021-11-02 23:05:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:19,857 INFO L225 Difference]: With dead ends: 4463 [2021-11-02 23:05:19,857 INFO L226 Difference]: Without dead ends: 4463 [2021-11-02 23:05:19,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 23:05:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-02 23:05:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 3111. [2021-11-02 23:05:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2166 states have (on average 1.8153277931671283) internal successors, (3932), 3085 states have internal predecessors, (3932), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 23:05:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 3981 transitions. [2021-11-02 23:05:19,921 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 3981 transitions. Word has length 55 [2021-11-02 23:05:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 3981 transitions. [2021-11-02 23:05:19,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 23:05:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 3981 transitions. [2021-11-02 23:05:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-02 23:05:19,923 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:19,923 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] [2021-11-02 23:05:19,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:20,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:20,136 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr73REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:20,137 INFO L85 PathProgramCache]: Analyzing trace with hash -158828041, now seen corresponding path program 1 times [2021-11-02 23:05:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:20,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649634074] [2021-11-02 23:05:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:20,138 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:20,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:20,140 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:20,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-02 23:05:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:20,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:20,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:21,098 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 23:05:21,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:21,268 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 23:05:21,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:21,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649634074] [2021-11-02 23:05:21,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649634074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:21,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:21,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:05:21,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901416907] [2021-11-02 23:05:21,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:21,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:21,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:21,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:21,269 INFO L87 Difference]: Start difference. First operand 3111 states and 3981 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 23:05:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:21,364 INFO L93 Difference]: Finished difference Result 4208 states and 4921 transitions. [2021-11-02 23:05:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:21,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 58 [2021-11-02 23:05:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:21,371 INFO L225 Difference]: With dead ends: 4208 [2021-11-02 23:05:21,371 INFO L226 Difference]: Without dead ends: 4208 [2021-11-02 23:05:21,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 113 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 23:05:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-11-02 23:05:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3099. [2021-11-02 23:05:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3099 states, 2154 states have (on average 1.8161559888579386) internal successors, (3912), 3073 states have internal predecessors, (3912), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 23:05:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 3961 transitions. [2021-11-02 23:05:21,473 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 3961 transitions. Word has length 58 [2021-11-02 23:05:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:21,474 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 3961 transitions. [2021-11-02 23:05:21,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 23:05:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 3961 transitions. [2021-11-02 23:05:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:05:21,475 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:21,476 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] [2021-11-02 23:05:21,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:21,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:21,696 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash 468734877, now seen corresponding path program 1 times [2021-11-02 23:05:21,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:21,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523477621] [2021-11-02 23:05:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:21,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:21,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:21,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-02 23:05:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:22,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:22,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:22,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:22,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:05:22,473 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-02 23:05:22,473 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 23:05:22,527 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-02 23:05:22,528 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 23:05:22,669 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 23:05:22,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:22,883 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 23:05:22,883 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:22,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523477621] [2021-11-02 23:05:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523477621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:22,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:22,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 23:05:22,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045833338] [2021-11-02 23:05:22,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:05:22,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:22,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:05:22,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:05:22,885 INFO L87 Difference]: Start difference. First operand 3099 states and 3961 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:27,029 INFO L93 Difference]: Finished difference Result 3327 states and 4200 transitions. [2021-11-02 23:05:27,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:05:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-11-02 23:05:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:27,033 INFO L225 Difference]: With dead ends: 3327 [2021-11-02 23:05:27,033 INFO L226 Difference]: Without dead ends: 3327 [2021-11-02 23:05:27,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 117 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 23:05:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-02 23:05:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3065. [2021-11-02 23:05:27,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 2120 states have (on average 1.8287735849056603) internal successors, (3877), 3039 states have internal predecessors, (3877), 25 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-02 23:05:27,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3926 transitions. [2021-11-02 23:05:27,072 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3926 transitions. Word has length 61 [2021-11-02 23:05:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:27,072 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3926 transitions. [2021-11-02 23:05:27,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:05:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3926 transitions. [2021-11-02 23:05:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-02 23:05:27,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:27,074 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] [2021-11-02 23:05:27,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:27,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:27,288 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash 73014525, now seen corresponding path program 1 times [2021-11-02 23:05:27,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:27,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74994225] [2021-11-02 23:05:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:27,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:27,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:27,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:27,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-02 23:05:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:05:28,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:28,534 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 23:05:28,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:29,004 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 23:05:29,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:29,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74994225] [2021-11-02 23:05:29,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74994225] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:29,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:29,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 23:05:29,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693935862] [2021-11-02 23:05:29,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:05:29,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:05:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:05:29,006 INFO L87 Difference]: Start difference. First operand 3065 states and 3926 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 23:05:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:29,180 INFO L93 Difference]: Finished difference Result 4507 states and 5561 transitions. [2021-11-02 23:05:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:05:29,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 63 [2021-11-02 23:05:29,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:29,186 INFO L225 Difference]: With dead ends: 4507 [2021-11-02 23:05:29,186 INFO L226 Difference]: Without dead ends: 4507 [2021-11-02 23:05:29,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 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 23:05:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-11-02 23:05:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3788. [2021-11-02 23:05:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 2839 states have (on average 1.792180345191969) internal successors, (5088), 3755 states have internal predecessors, (5088), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:05:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 5151 transitions. [2021-11-02 23:05:29,255 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 5151 transitions. Word has length 63 [2021-11-02 23:05:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:29,256 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 5151 transitions. [2021-11-02 23:05:29,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 23:05:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 5151 transitions. [2021-11-02 23:05:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-02 23:05:29,257 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:29,258 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] [2021-11-02 23:05:29,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:29,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:05:29,476 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr391REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:05:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1815743939, now seen corresponding path program 1 times [2021-11-02 23:05:29,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:05:29,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203658363] [2021-11-02 23:05:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:29,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:05:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:05:29,480 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:05:29,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-02 23:05:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:05:30,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:30,717 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 23:05:30,724 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 23:05:31,558 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:05:31,559 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 23:05:31,564 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:05:31,565 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 23:05:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:31,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:05:36,921 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 23:05:36,921 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:05:36,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203658363] [2021-11-02 23:05:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203658363] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:36,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:36,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 23:05:36,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769681368] [2021-11-02 23:05:36,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:05:36,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:05:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:05:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-02 23:05:36,923 INFO L87 Difference]: Start difference. First operand 3788 states and 5151 transitions. Second operand has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 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 23:06:11,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:11,216 INFO L93 Difference]: Finished difference Result 6730 states and 9145 transitions. [2021-11-02 23:06:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:06:11,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 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 66 [2021-11-02 23:06:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:11,223 INFO L225 Difference]: With dead ends: 6730 [2021-11-02 23:06:11,223 INFO L226 Difference]: Without dead ends: 6730 [2021-11-02 23:06:11,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-02 23:06:11,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-02 23:06:11,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 3732. [2021-11-02 23:06:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2847 states have (on average 1.7379697927643134) internal successors, (4948), 3699 states have internal predecessors, (4948), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:06:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 5011 transitions. [2021-11-02 23:06:11,289 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 5011 transitions. Word has length 66 [2021-11-02 23:06:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:11,289 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 5011 transitions. [2021-11-02 23:06:11,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.2) internal successors, (121), 6 states have internal predecessors, (121), 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 23:06:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 5011 transitions. [2021-11-02 23:06:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:06:11,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:11,291 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] [2021-11-02 23:06:11,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:11,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:06:11,504 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr396REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:06:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:11,505 INFO L85 PathProgramCache]: Analyzing trace with hash -407756336, now seen corresponding path program 1 times [2021-11-02 23:06:11,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:06:11,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912611015] [2021-11-02 23:06:11,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:11,506 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:06:11,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:06:11,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:06:11,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-02 23:06:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:06:12,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:12,619 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 23:06:12,633 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 23:06:12,691 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 23:06:12,711 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 23:06:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:06:12,891 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 23:06:12,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:06:12,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912611015] [2021-11-02 23:06:12,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912611015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:12,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:12,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:06:12,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581041314] [2021-11-02 23:06:12,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:06:12,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:06:12,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:06:12,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:06:12,895 INFO L87 Difference]: Start difference. First operand 3732 states and 5011 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 23:06:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:20,146 INFO L93 Difference]: Finished difference Result 3731 states and 5008 transitions. [2021-11-02 23:06:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:06:20,147 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 71 [2021-11-02 23:06:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:20,150 INFO L225 Difference]: With dead ends: 3731 [2021-11-02 23:06:20,151 INFO L226 Difference]: Without dead ends: 3731 [2021-11-02 23:06:20,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 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 23:06:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-02 23:06:20,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-02 23:06:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 2847 states have (on average 1.7369160519845452) internal successors, (4945), 3698 states have internal predecessors, (4945), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:06:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5008 transitions. [2021-11-02 23:06:20,198 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5008 transitions. Word has length 71 [2021-11-02 23:06:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:20,199 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5008 transitions. [2021-11-02 23:06:20,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 23:06:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5008 transitions. [2021-11-02 23:06:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:06:20,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:20,201 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] [2021-11-02 23:06:20,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:20,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:06:20,412 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr397REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:06:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash -407756335, now seen corresponding path program 1 times [2021-11-02 23:06:20,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:06:20,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114993613] [2021-11-02 23:06:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:20,413 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:06:20,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:06:20,414 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:06:20,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-02 23:06:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:06:21,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:21,381 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 23:06:21,404 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 23:06:21,434 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 23:06:21,509 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 23:06:21,524 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 23:06:21,554 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 23:06:21,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:06:21,918 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 23:06:21,918 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:06:21,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114993613] [2021-11-02 23:06:21,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114993613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:21,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:21,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 23:06:21,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160623536] [2021-11-02 23:06:21,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:21,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:06:21,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:21,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:21,920 INFO L87 Difference]: Start difference. First operand 3731 states and 5008 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 23:06:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:45,804 INFO L93 Difference]: Finished difference Result 3730 states and 5005 transitions. [2021-11-02 23:06:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:06:45,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 71 [2021-11-02 23:06:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:45,809 INFO L225 Difference]: With dead ends: 3730 [2021-11-02 23:06:45,809 INFO L226 Difference]: Without dead ends: 3730 [2021-11-02 23:06:45,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 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 23:06:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-02 23:06:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-02 23:06:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3730 states, 2844 states have (on average 1.7376933895921238) internal successors, (4942), 3697 states have internal predecessors, (4942), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:06:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5005 transitions. [2021-11-02 23:06:45,844 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5005 transitions. Word has length 71 [2021-11-02 23:06:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:45,844 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5005 transitions. [2021-11-02 23:06:45,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 23:06:45,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5005 transitions. [2021-11-02 23:06:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:06:45,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:45,846 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] [2021-11-02 23:06:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:46,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:06:46,047 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr78REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:06:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:46,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255012, now seen corresponding path program 1 times [2021-11-02 23:06:46,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:06:46,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361869865] [2021-11-02 23:06:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:46,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:06:46,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:06:46,051 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:06:46,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-02 23:06:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:06:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:47,081 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 23:06:47,099 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 23 treesize of output 19 [2021-11-02 23:06:47,153 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 25 treesize of output 13 [2021-11-02 23:06:47,174 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 23:06:47,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:06:47,381 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 23:06:47,382 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:06:47,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361869865] [2021-11-02 23:06:47,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361869865] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:47,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:47,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 23:06:47,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696247079] [2021-11-02 23:06:47,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:06:47,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:06:47,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:06:47,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:06:47,384 INFO L87 Difference]: Start difference. First operand 3730 states and 5005 transitions. Second operand has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 23:06:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:54,810 INFO L93 Difference]: Finished difference Result 3729 states and 5003 transitions. [2021-11-02 23:06:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:06:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 71 [2021-11-02 23:06:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:54,814 INFO L225 Difference]: With dead ends: 3729 [2021-11-02 23:06:54,814 INFO L226 Difference]: Without dead ends: 3729 [2021-11-02 23:06:54,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 2 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 23:06:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-02 23:06:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-02 23:06:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3729 states, 2844 states have (on average 1.7369901547116737) internal successors, (4940), 3696 states have internal predecessors, (4940), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:06:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5003 transitions. [2021-11-02 23:06:54,859 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5003 transitions. Word has length 71 [2021-11-02 23:06:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:54,860 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5003 transitions. [2021-11-02 23:06:54,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 17.0) internal successors, (68), 5 states have internal predecessors, (68), 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 23:06:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5003 transitions. [2021-11-02 23:06:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 23:06:54,861 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:54,862 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] [2021-11-02 23:06:54,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:06:55,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:06:55,076 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr79REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:06:55,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:55,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255013, now seen corresponding path program 1 times [2021-11-02 23:06:55,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:06:55,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015677772] [2021-11-02 23:06:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:55,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:06:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:06:55,079 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:06:55,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-02 23:06:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:06:55,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:56,164 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 23:06:56,203 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 23:06:56,216 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 23:06:56,302 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 23:06:56,305 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 23:06:56,330 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 23:06:56,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:06:56,715 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 23:06:56,715 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:06:56,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015677772] [2021-11-02 23:06:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015677772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:56,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:06:56,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-02 23:06:56,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317451008] [2021-11-02 23:06:56,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:06:56,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:06:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:06:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:06:56,718 INFO L87 Difference]: Start difference. First operand 3729 states and 5003 transitions. Second operand has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 23:07:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:20,954 INFO L93 Difference]: Finished difference Result 3728 states and 5001 transitions. [2021-11-02 23:07:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 71 [2021-11-02 23:07:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:20,960 INFO L225 Difference]: With dead ends: 3728 [2021-11-02 23:07:20,961 INFO L226 Difference]: Without dead ends: 3728 [2021-11-02 23:07:20,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 135 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 23:07:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-02 23:07:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-02 23:07:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2842 states have (on average 1.737508796622097) internal successors, (4938), 3695 states have internal predecessors, (4938), 32 states have call successors, (32), 5 states have call predecessors, (32), 4 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-02 23:07:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5001 transitions. [2021-11-02 23:07:21,012 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5001 transitions. Word has length 71 [2021-11-02 23:07:21,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5001 transitions. [2021-11-02 23:07:21,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.714285714285714) internal successors, (75), 8 states have internal predecessors, (75), 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 23:07:21,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5001 transitions. [2021-11-02 23:07:21,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-02 23:07:21,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:21,014 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, 1, 1] [2021-11-02 23:07:21,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:21,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:07:21,233 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:07:21,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:21,233 INFO L85 PathProgramCache]: Analyzing trace with hash 491384311, now seen corresponding path program 1 times [2021-11-02 23:07:21,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:07:21,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280493780] [2021-11-02 23:07:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:21,234 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:07:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:07:21,235 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:07:21,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-02 23:07:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 23:07:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:22,375 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 23:07:22,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:07:22,608 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 23:07:22,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:07:22,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280493780] [2021-11-02 23:07:22,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280493780] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 23:07:22,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:07:22,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-02 23:07:22,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98406170] [2021-11-02 23:07:22,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:07:22,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:07:22,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:07:22,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:07:22,610 INFO L87 Difference]: Start difference. First operand 3728 states and 5001 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 23:07:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:22,820 INFO L93 Difference]: Finished difference Result 3738 states and 5017 transitions. [2021-11-02 23:07:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:07:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 23:07:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:22,830 INFO L225 Difference]: With dead ends: 3738 [2021-11-02 23:07:22,830 INFO L226 Difference]: Without dead ends: 3738 [2021-11-02 23:07:22,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 153 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 23:07:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-11-02 23:07:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3738. [2021-11-02 23:07:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 2850 states have (on average 1.736842105263158) internal successors, (4950), 3704 states have internal predecessors, (4950), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-02 23:07:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5017 transitions. [2021-11-02 23:07:22,900 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5017 transitions. Word has length 79 [2021-11-02 23:07:22,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:22,900 INFO L470 AbstractCegarLoop]: Abstraction has 3738 states and 5017 transitions. [2021-11-02 23:07:22,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 23:07:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5017 transitions. [2021-11-02 23:07:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-02 23:07:22,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:22,902 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, 1, 1] [2021-11-02 23:07:22,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:23,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:07:23,108 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:07:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:23,109 INFO L85 PathProgramCache]: Analyzing trace with hash -787144713, now seen corresponding path program 1 times [2021-11-02 23:07:23,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:07:23,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469696125] [2021-11-02 23:07:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:07:23,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:07:23,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:07:23,110 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:07:23,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-02 23:07:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:07:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:07:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:24,282 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 23:07:24,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:07:24,641 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 23:07:24,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:07:24,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469696125] [2021-11-02 23:07:24,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469696125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:07:24,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:07:24,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-02 23:07:24,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564223161] [2021-11-02 23:07:24,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:07:24,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:07:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:07:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:07:24,643 INFO L87 Difference]: Start difference. First operand 3738 states and 5017 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 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 23:07:25,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:07:25,225 INFO L93 Difference]: Finished difference Result 3752 states and 5041 transitions. [2021-11-02 23:07:25,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:07:25,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 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 81 [2021-11-02 23:07:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:07:25,238 INFO L225 Difference]: With dead ends: 3752 [2021-11-02 23:07:25,239 INFO L226 Difference]: Without dead ends: 3748 [2021-11-02 23:07:25,239 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:07:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-02 23:07:25,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3744. [2021-11-02 23:07:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 2856 states have (on average 1.7359943977591037) internal successors, (4958), 3710 states have internal predecessors, (4958), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (35), 28 states have call predecessors, (35), 31 states have call successors, (35) [2021-11-02 23:07:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5025 transitions. [2021-11-02 23:07:25,303 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5025 transitions. Word has length 81 [2021-11-02 23:07:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:07:25,304 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5025 transitions. [2021-11-02 23:07:25,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 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 23:07:25,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5025 transitions. [2021-11-02 23:07:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-02 23:07:25,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:07:25,306 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, 1, 1] [2021-11-02 23:07:25,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:07:25,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 23:07:25,520 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-02 23:07:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:07:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1438516215, now seen corresponding path program 2 times [2021-11-02 23:07:25,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 23:07:25,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135689538] [2021-11-02 23:07:25,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:07:25,522 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 23:07:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 23:07:25,524 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 23:07:25,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_239dc87e-3aba-4b8f-9fe3-5def50777e08/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-02 23:07:26,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 23:07:26,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:07:26,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 23:07:26,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:07:26,786 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 23:07:26,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:26,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:26,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 23:07:26,879 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-02 23:07:26,879 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 23:07:26,995 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:07:26,996 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 15 treesize of output 15 [2021-11-02 23:07:27,254 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-02 23:07:27,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-02 23:07:32,968 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-02 23:07:32,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-02 23:07:43,207 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-02 23:07:43,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-02 23:07:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:07:43,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:07:47,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_#t~mem11| (_ BitVec 32)) (|main_#t~mem12| (_ BitVec 32)) (main_~user~0.offset (_ BitVec 32)) (|main_#t~mem13| (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| c_main_~user~0.base (let ((.cse1 (bvmul |main_#t~mem12| |main_#t~mem13|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| c_main_~user~0.base) main_~user~0.offset ((_ extract 7 0) |main_#t~mem11|)) (bvadd main_~user~0.offset (_ bv1 32)) ((_ extract 15 8) |main_#t~mem11|)) (bvadd (_ bv2 32) main_~user~0.offset) ((_ extract 23 16) |main_#t~mem11|)) (bvadd (_ bv3 32) main_~user~0.offset) ((_ extract 31 24) |main_#t~mem11|)) (bvadd (_ bv4 32) main_~user~0.offset) ((_ extract 7 0) .cse1)) (bvadd main_~user~0.offset (_ bv5 32)) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) main_~user~0.offset) ((_ extract 23 16) .cse1)) (bvadd main_~user~0.offset (_ bv7 32)) ((_ extract 31 24) .cse1)))) |c_main_~#i~0.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_main_~#i~0.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_main_~#i~0.offset|))) (select .cse0 (bvadd |c_main_~#i~0.offset| (_ bv1 32)))) (select .cse0 |c_main_~#i~0.offset|))) (_ bv10 32))) is different from false