./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX --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 c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:29:36,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:29:36,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:29:36,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:29:36,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:29:36,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:29:36,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:29:36,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:29:36,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:29:36,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:29:36,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:29:36,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:29:36,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:29:36,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:29:36,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:29:36,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:29:36,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:29:36,311 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:29:36,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:29:36,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:29:36,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:29:36,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:29:36,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:29:36,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:29:36,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:29:36,341 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:29:36,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:29:36,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:29:36,344 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:29:36,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:29:36,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:29:36,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:29:36,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:29:36,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:29:36,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:29:36,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:29:36,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:29:36,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:29:36,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:29:36,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:29:36,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:29:36,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:29:36,401 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:29:36,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:29:36,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:29:36,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:29:36,410 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:29:36,410 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:29:36,410 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:29:36,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:29:36,411 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:29:36,411 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:29:36,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:29:36,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:29:36,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:29:36,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:29:36,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:29:36,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:29:36,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:29:36,414 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:29:36,414 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:29:36,414 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:29:36,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:29:36,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:29:36,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:29:36,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:36,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:29:36,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:29:36,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:29:36,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:29:36,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:29:36,417 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_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af [2021-11-09 08:29:36,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:29:36,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:29:36,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:29:36,739 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:29:36,740 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:29:36,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2021-11-09 08:29:36,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/1009299a6/c40858a343564045a1b6deb330fad61a/FLAGeafe5e5da [2021-11-09 08:29:37,477 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:29:37,478 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2021-11-09 08:29:37,498 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/1009299a6/c40858a343564045a1b6deb330fad61a/FLAGeafe5e5da [2021-11-09 08:29:37,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/1009299a6/c40858a343564045a1b6deb330fad61a [2021-11-09 08:29:37,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:29:37,689 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:29:37,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:37,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:29:37,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:29:37,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:37,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@152a0886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:37, skipping insertion in model container [2021-11-09 08:29:37,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:37" (1/1) ... [2021-11-09 08:29:37,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:29:37,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:38,371 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2021-11-09 08:29:38,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:38,663 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) [2021-11-09 08:29:38,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1403c490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:38, skipping insertion in model container [2021-11-09 08:29:38,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:38,679 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 08:29:38,681 INFO L168 Benchmark]: Toolchain (without parser) took 991.29 ms. Allocated memory is still 111.1 MB. Free memory was 67.6 MB in the beginning and 65.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:29:38,682 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:29:38,683 INFO L168 Benchmark]: CACSL2BoogieTranslator took 988.59 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 65.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 08:29:38,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 111.1 MB. Free memory is still 88.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 988.59 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 65.7 MB in the end (delta: 1.7 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_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX --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 c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:29:41,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:29:41,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:29:41,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:29:41,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:29:41,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:29:41,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:29:41,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:29:41,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:29:41,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:29:41,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:29:41,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:29:41,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:29:41,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:29:41,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:29:41,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:29:41,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:29:41,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:29:41,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:29:41,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:29:41,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:29:41,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:29:41,170 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:29:41,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:29:41,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:29:41,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:29:41,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:29:41,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:29:41,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:29:41,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:29:41,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:29:41,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:29:41,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:29:41,193 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:29:41,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:29:41,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:29:41,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:29:41,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:29:41,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:29:41,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:29:41,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:29:41,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 08:29:41,260 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:29:41,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:29:41,261 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:29:41,261 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:29:41,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:29:41,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:29:41,264 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:29:41,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:29:41,264 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:29:41,264 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:29:41,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:29:41,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:29:41,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:29:41,266 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:29:41,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 08:29:41,267 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:29:41,268 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:29:41,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:29:41,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:29:41,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:29:41,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:41,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:29:41,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:29:41,269 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 08:29:41,269 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 08:29:41,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:29:41,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 08:29:41,270 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_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af [2021-11-09 08:29:41,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:29:41,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:29:41,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:29:41,731 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:29:41,732 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:29:41,735 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2021-11-09 08:29:41,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/16767bfc6/e0732fb8450843dc8fbda8b19469f4ce/FLAG32b5de298 [2021-11-09 08:29:42,552 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:29:42,553 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2021-11-09 08:29:42,590 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/16767bfc6/e0732fb8450843dc8fbda8b19469f4ce/FLAG32b5de298 [2021-11-09 08:29:42,693 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/data/16767bfc6/e0732fb8450843dc8fbda8b19469f4ce [2021-11-09 08:29:42,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:29:42,697 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:29:42,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:42,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:29:42,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:29:42,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:42" (1/1) ... [2021-11-09 08:29:42,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cf4d19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:42, skipping insertion in model container [2021-11-09 08:29:42,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:29:42" (1/1) ... [2021-11-09 08:29:42,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:29:42,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:43,287 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_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2021-11-09 08:29:43,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:43,582 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 08:29:43,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:29:43,615 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_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2021-11-09 08:29:43,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:43,782 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:29:43,822 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_ad881132-f201-4b84-a9cf-834fd0f9de67/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2021-11-09 08:29:43,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:29:44,007 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:29:44,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44 WrapperNode [2021-11-09 08:29:44,008 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:29:44,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:29:44,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:29:44,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:29:44,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,290 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:29:44,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:29:44,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:29:44,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:29:44,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (1/1) ... [2021-11-09 08:29:44,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:29:44,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:29:44,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:29:44,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:29:44,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:29:44,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:29:44,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 08:29:44,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:29:44,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-09 08:29:44,423 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-09 08:29:44,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:29:44,424 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-09 08:29:44,425 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-09 08:29:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-09 08:29:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-09 08:29:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-09 08:29:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-09 08:29:44,426 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-09 08:29:44,427 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-09 08:29:44,428 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-09 08:29:44,429 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-09 08:29:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-09 08:29:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-09 08:29:44,430 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-09 08:29:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-09 08:29:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-09 08:29:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-09 08:29:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-09 08:29:44,433 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-09 08:29:44,433 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-09 08:29:44,433 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-09 08:29:44,433 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-09 08:29:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-09 08:29:44,453 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-09 08:29:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-09 08:29:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-09 08:29:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-09 08:29:44,454 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-09 08:29:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-09 08:29:44,456 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-09 08:29:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-09 08:29:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-09 08:29:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-09 08:29:44,457 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:29:44,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:29:44,459 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:29:44,460 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:29:44,460 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:29:44,461 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:29:44,462 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:29:44,463 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:29:44,464 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:29:44,465 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:29:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:29:44,466 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:29:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:29:44,467 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:29:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:29:44,470 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:29:44,471 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:29:44,472 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:29:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:29:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:29:44,473 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:29:44,474 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:29:44,475 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:29:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:29:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:29:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:29:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:29:44,479 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:29:44,480 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:29:44,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:29:44,482 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:29:44,483 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:29:44,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:29:44,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 08:29:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 08:29:45,189 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 08:29:55,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:29:55,831 INFO L299 CfgBuilder]: Removed 168 assume(true) statements. [2021-11-09 08:29:55,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:55 BoogieIcfgContainer [2021-11-09 08:29:55,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:29:55,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:29:55,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:29:55,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:29:55,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:29:42" (1/3) ... [2021-11-09 08:29:55,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ecc06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:55, skipping insertion in model container [2021-11-09 08:29:55,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:29:44" (2/3) ... [2021-11-09 08:29:55,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ecc06d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:29:55, skipping insertion in model container [2021-11-09 08:29:55,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:29:55" (3/3) ... [2021-11-09 08:29:55,846 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test10-3.i [2021-11-09 08:29:55,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:29:55,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1193 error locations. [2021-11-09 08:29:55,900 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:29:55,907 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 [2021-11-09 08:29:55,907 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1193 error locations. [2021-11-09 08:29:55,957 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) [2021-11-09 08:29:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:29:55,965 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:29:55,965 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:29:55,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:29:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:29:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007294, now seen corresponding path program 1 times [2021-11-09 08:29:55,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:29:55,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438312071] [2021-11-09 08:29:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:29:55,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:29:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:29:55,989 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:29:55,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 08:29:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:29:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:29:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:29:56,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:29:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:56,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:29:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:29:56,547 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:29:56,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438312071] [2021-11-09 08:29:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438312071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:29:56,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:29:56,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:29:56,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019735374] [2021-11-09 08:29:56,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:29:56,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:29:56,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:29:56,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:29:56,577 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) [2021-11-09 08:30:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:01,866 INFO L93 Difference]: Finished difference Result 3286 states and 3488 transitions. [2021-11-09 08:30:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:01,867 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 [2021-11-09 08:30:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:01,904 INFO L225 Difference]: With dead ends: 3286 [2021-11-09 08:30:01,905 INFO L226 Difference]: Without dead ends: 3283 [2021-11-09 08:30:01,906 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 [2021-11-09 08:30:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-09 08:30:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2583. [2021-11-09 08:30:02,052 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) [2021-11-09 08:30:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2583 states to 2583 states and 2926 transitions. [2021-11-09 08:30:02,070 INFO L78 Accepts]: Start accepts. Automaton has 2583 states and 2926 transitions. Word has length 7 [2021-11-09 08:30:02,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:02,071 INFO L470 AbstractCegarLoop]: Abstraction has 2583 states and 2926 transitions. [2021-11-09 08:30:02,071 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) [2021-11-09 08:30:02,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2583 states and 2926 transitions. [2021-11-09 08:30:02,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 08:30:02,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:02,072 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:02,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:02,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:02,287 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:02,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1848007293, now seen corresponding path program 1 times [2021-11-09 08:30:02,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:02,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095920535] [2021-11-09 08:30:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:02,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:02,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:02,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 08:30:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:02,590 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 [2021-11-09 08:30:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:02,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:02,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:02,692 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:02,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095920535] [2021-11-09 08:30:02,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095920535] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:02,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:02,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 08:30:02,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549453782] [2021-11-09 08:30:02,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:02,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:02,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:02,696 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) [2021-11-09 08:30:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:14,163 INFO L93 Difference]: Finished difference Result 4061 states and 4523 transitions. [2021-11-09 08:30:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:14,164 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 [2021-11-09 08:30:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:14,187 INFO L225 Difference]: With dead ends: 4061 [2021-11-09 08:30:14,187 INFO L226 Difference]: Without dead ends: 4061 [2021-11-09 08:30:14,188 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 [2021-11-09 08:30:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-09 08:30:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2747. [2021-11-09 08:30:14,257 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) [2021-11-09 08:30:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3268 transitions. [2021-11-09 08:30:14,268 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3268 transitions. Word has length 7 [2021-11-09 08:30:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:14,269 INFO L470 AbstractCegarLoop]: Abstraction has 2747 states and 3268 transitions. [2021-11-09 08:30:14,269 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) [2021-11-09 08:30:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3268 transitions. [2021-11-09 08:30:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:30:14,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:14,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:14,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:14,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:14,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:14,482 INFO L85 PathProgramCache]: Analyzing trace with hash 515316259, now seen corresponding path program 1 times [2021-11-09 08:30:14,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:14,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339303335] [2021-11-09 08:30:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:14,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:14,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:14,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 08:30:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:14,808 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 [2021-11-09 08:30:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:14,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:14,861 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:14,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339303335] [2021-11-09 08:30:14,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339303335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:14,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:14,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 08:30:14,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729577398] [2021-11-09 08:30:14,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:30:14,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:30:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:30:14,863 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) [2021-11-09 08:30:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:18,776 INFO L93 Difference]: Finished difference Result 3485 states and 4006 transitions. [2021-11-09 08:30:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:18,777 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 [2021-11-09 08:30:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:18,793 INFO L225 Difference]: With dead ends: 3485 [2021-11-09 08:30:18,793 INFO L226 Difference]: Without dead ends: 3485 [2021-11-09 08:30:18,793 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 [2021-11-09 08:30:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-11-09 08:30:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 2656. [2021-11-09 08:30:18,852 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) [2021-11-09 08:30:18,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 3143 transitions. [2021-11-09 08:30:18,862 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 3143 transitions. Word has length 12 [2021-11-09 08:30:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 2656 states and 3143 transitions. [2021-11-09 08:30:18,863 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) [2021-11-09 08:30:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 3143 transitions. [2021-11-09 08:30:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 08:30:18,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:18,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:18,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:19,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:19,079 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash 515316260, now seen corresponding path program 1 times [2021-11-09 08:30:19,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:19,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602221496] [2021-11-09 08:30:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:19,082 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:19,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:19,083 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:19,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 08:30:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:19,368 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 [2021-11-09 08:30:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:19,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:19,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:19,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602221496] [2021-11-09 08:30:19,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602221496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:19,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:19,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 08:30:19,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169562977] [2021-11-09 08:30:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:19,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:19,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:19,525 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) [2021-11-09 08:30:30,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:30,011 INFO L93 Difference]: Finished difference Result 3611 states and 4034 transitions. [2021-11-09 08:30:30,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:30,012 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 [2021-11-09 08:30:30,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:30,029 INFO L225 Difference]: With dead ends: 3611 [2021-11-09 08:30:30,029 INFO L226 Difference]: Without dead ends: 3611 [2021-11-09 08:30:30,029 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 [2021-11-09 08:30:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-11-09 08:30:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2648. [2021-11-09 08:30:30,084 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) [2021-11-09 08:30:30,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 3123 transitions. [2021-11-09 08:30:30,097 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 3123 transitions. Word has length 12 [2021-11-09 08:30:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:30,097 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 3123 transitions. [2021-11-09 08:30:30,097 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) [2021-11-09 08:30:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 3123 transitions. [2021-11-09 08:30:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 08:30:30,099 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:30,099 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:30,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:30,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:30,311 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr658REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1098922193, now seen corresponding path program 1 times [2021-11-09 08:30:30,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:30,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336800374] [2021-11-09 08:30:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:30,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:30,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:30,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:30,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 08:30:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:30,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:30,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:30,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:30,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:30,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336800374] [2021-11-09 08:30:30,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336800374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:30,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:30,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:30:30,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548373555] [2021-11-09 08:30:30,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:30,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:30,633 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) [2021-11-09 08:30:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:30,693 INFO L93 Difference]: Finished difference Result 2606 states and 3080 transitions. [2021-11-09 08:30:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:30,693 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 [2021-11-09 08:30:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:30,707 INFO L225 Difference]: With dead ends: 2606 [2021-11-09 08:30:30,707 INFO L226 Difference]: Without dead ends: 2606 [2021-11-09 08:30:30,708 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 [2021-11-09 08:30:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-11-09 08:30:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2606. [2021-11-09 08:30:30,784 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) [2021-11-09 08:30:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3080 transitions. [2021-11-09 08:30:30,801 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3080 transitions. Word has length 15 [2021-11-09 08:30:30,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:30,802 INFO L470 AbstractCegarLoop]: Abstraction has 2606 states and 3080 transitions. [2021-11-09 08:30:30,803 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) [2021-11-09 08:30:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3080 transitions. [2021-11-09 08:30:30,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:30:30,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:30,804 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:30:30,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:31,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:31,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr682REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -497671989, now seen corresponding path program 1 times [2021-11-09 08:30:31,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:31,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569452089] [2021-11-09 08:30:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:31,018 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:31,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:31,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 08:30:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:31,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:31,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:31,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:31,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:31,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569452089] [2021-11-09 08:30:31,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569452089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:31,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:31,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:30:31,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447253944] [2021-11-09 08:30:31,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:31,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:31,359 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) [2021-11-09 08:30:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:31,451 INFO L93 Difference]: Finished difference Result 2585 states and 3052 transitions. [2021-11-09 08:30:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:31,452 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 [2021-11-09 08:30:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:31,468 INFO L225 Difference]: With dead ends: 2585 [2021-11-09 08:30:31,468 INFO L226 Difference]: Without dead ends: 2585 [2021-11-09 08:30:31,469 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 [2021-11-09 08:30:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2021-11-09 08:30:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2584. [2021-11-09 08:30:31,523 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) [2021-11-09 08:30:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3051 transitions. [2021-11-09 08:30:31,529 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3051 transitions. Word has length 17 [2021-11-09 08:30:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:31,529 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 3051 transitions. [2021-11-09 08:30:31,530 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) [2021-11-09 08:30:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3051 transitions. [2021-11-09 08:30:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:30:31,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:31,532 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] [2021-11-09 08:30:31,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-09 08:30:31,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:31,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr334REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:31,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:31,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2032047504, now seen corresponding path program 1 times [2021-11-09 08:30:31,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:31,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065184455] [2021-11-09 08:30:31,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:31,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:31,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:31,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 08:30:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:32,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:32,133 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:32,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065184455] [2021-11-09 08:30:32,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065184455] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:32,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:32,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:30:32,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484599105] [2021-11-09 08:30:32,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:32,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:32,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:32,135 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) [2021-11-09 08:30:32,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:32,230 INFO L93 Difference]: Finished difference Result 4195 states and 4766 transitions. [2021-11-09 08:30:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:32,231 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 [2021-11-09 08:30:32,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:32,252 INFO L225 Difference]: With dead ends: 4195 [2021-11-09 08:30:32,253 INFO L226 Difference]: Without dead ends: 4195 [2021-11-09 08:30:32,253 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 [2021-11-09 08:30:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-11-09 08:30:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2506. [2021-11-09 08:30:32,311 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) [2021-11-09 08:30:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2506 states to 2506 states and 2922 transitions. [2021-11-09 08:30:32,319 INFO L78 Accepts]: Start accepts. Automaton has 2506 states and 2922 transitions. Word has length 24 [2021-11-09 08:30:32,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:32,320 INFO L470 AbstractCegarLoop]: Abstraction has 2506 states and 2922 transitions. [2021-11-09 08:30:32,320 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) [2021-11-09 08:30:32,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2506 states and 2922 transitions. [2021-11-09 08:30:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 08:30:32,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:32,322 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] [2021-11-09 08:30:32,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:32,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:32,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr16REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:32,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:32,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2117616112, now seen corresponding path program 1 times [2021-11-09 08:30:32,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:32,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670494232] [2021-11-09 08:30:32,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:32,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:32,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:32,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:32,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 08:30:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:32,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:30:32,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:32,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:32,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670494232] [2021-11-09 08:30:32,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670494232] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:32,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:32,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 08:30:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789521775] [2021-11-09 08:30:32,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:32,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:32,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:32,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:32,938 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) [2021-11-09 08:30:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:32,980 INFO L93 Difference]: Finished difference Result 4118 states and 4689 transitions. [2021-11-09 08:30:32,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:30:32,980 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 [2021-11-09 08:30:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:32,993 INFO L225 Difference]: With dead ends: 4118 [2021-11-09 08:30:32,993 INFO L226 Difference]: Without dead ends: 4118 [2021-11-09 08:30:32,993 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 [2021-11-09 08:30:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-11-09 08:30:33,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2464. [2021-11-09 08:30:33,057 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) [2021-11-09 08:30:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 2879 transitions. [2021-11-09 08:30:33,063 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 2879 transitions. Word has length 24 [2021-11-09 08:30:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:33,063 INFO L470 AbstractCegarLoop]: Abstraction has 2464 states and 2879 transitions. [2021-11-09 08:30:33,063 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) [2021-11-09 08:30:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 2879 transitions. [2021-11-09 08:30:33,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:30:33,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:33,065 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] [2021-11-09 08:30:33,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:33,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:33,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr358REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1412495274, now seen corresponding path program 1 times [2021-11-09 08:30:33,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:33,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410102882] [2021-11-09 08:30:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:33,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:33,281 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:33,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 08:30:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:33,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:33,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:33,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410102882] [2021-11-09 08:30:33,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410102882] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:33,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:33,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:30:33,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733708922] [2021-11-09 08:30:33,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:33,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:33,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:33,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:33,770 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) [2021-11-09 08:30:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:33,915 INFO L93 Difference]: Finished difference Result 4076 states and 4596 transitions. [2021-11-09 08:30:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:33,916 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 [2021-11-09 08:30:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:33,929 INFO L225 Difference]: With dead ends: 4076 [2021-11-09 08:30:33,929 INFO L226 Difference]: Without dead ends: 4076 [2021-11-09 08:30:33,929 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 [2021-11-09 08:30:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-09 08:30:33,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2426. [2021-11-09 08:30:33,985 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) [2021-11-09 08:30:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2792 transitions. [2021-11-09 08:30:33,990 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2792 transitions. Word has length 26 [2021-11-09 08:30:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:33,991 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2792 transitions. [2021-11-09 08:30:33,991 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) [2021-11-09 08:30:33,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2792 transitions. [2021-11-09 08:30:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-09 08:30:33,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:33,992 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] [2021-11-09 08:30:34,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:34,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:34,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr40REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash -785415766, now seen corresponding path program 1 times [2021-11-09 08:30:34,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:34,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773867668] [2021-11-09 08:30:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:34,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:34,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:34,207 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:34,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 08:30:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:34,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:34,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:34,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:34,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773867668] [2021-11-09 08:30:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773867668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:34,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:34,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 08:30:34,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276208774] [2021-11-09 08:30:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:30:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:30:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:30:34,660 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) [2021-11-09 08:30:34,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:34,806 INFO L93 Difference]: Finished difference Result 4037 states and 4545 transitions. [2021-11-09 08:30:34,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:34,807 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 [2021-11-09 08:30:34,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:34,817 INFO L225 Difference]: With dead ends: 4037 [2021-11-09 08:30:34,817 INFO L226 Difference]: Without dead ends: 4037 [2021-11-09 08:30:34,818 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 [2021-11-09 08:30:34,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-11-09 08:30:34,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 2404. [2021-11-09 08:30:34,891 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) [2021-11-09 08:30:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 2763 transitions. [2021-11-09 08:30:34,896 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 2763 transitions. Word has length 26 [2021-11-09 08:30:34,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:34,897 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 2763 transitions. [2021-11-09 08:30:34,897 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) [2021-11-09 08:30:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 2763 transitions. [2021-11-09 08:30:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:30:34,898 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:34,899 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] [2021-11-09 08:30:34,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:35,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:35,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr696REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:35,112 INFO L85 PathProgramCache]: Analyzing trace with hash -253561191, now seen corresponding path program 1 times [2021-11-09 08:30:35,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:35,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906733241] [2021-11-09 08:30:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:35,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:35,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:35,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 08:30:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:30:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:35,391 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 [2021-11-09 08:30:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:35,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:35,644 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:35,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906733241] [2021-11-09 08:30:35,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906733241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:35,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:35,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:30:35,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531296855] [2021-11-09 08:30:35,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:30:35,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:30:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:30:35,647 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) [2021-11-09 08:30:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:40,145 INFO L93 Difference]: Finished difference Result 3025 states and 3303 transitions. [2021-11-09 08:30:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:30:40,146 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 [2021-11-09 08:30:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:40,151 INFO L225 Difference]: With dead ends: 3025 [2021-11-09 08:30:40,151 INFO L226 Difference]: Without dead ends: 3025 [2021-11-09 08:30:40,151 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 [2021-11-09 08:30:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-11-09 08:30:40,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 2400. [2021-11-09 08:30:40,186 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) [2021-11-09 08:30:40,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 2759 transitions. [2021-11-09 08:30:40,192 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 2759 transitions. Word has length 31 [2021-11-09 08:30:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:40,192 INFO L470 AbstractCegarLoop]: Abstraction has 2400 states and 2759 transitions. [2021-11-09 08:30:40,192 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) [2021-11-09 08:30:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 2759 transitions. [2021-11-09 08:30:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:30:40,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:40,194 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] [2021-11-09 08:30:40,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:30:40,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:40,406 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr697REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:40,407 INFO L85 PathProgramCache]: Analyzing trace with hash -253561190, now seen corresponding path program 1 times [2021-11-09 08:30:40,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:40,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056344444] [2021-11-09 08:30:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:40,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:40,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:40,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:40,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 08:30:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:30:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:30:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:30:40,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:30:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:40,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:30:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:30:41,493 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:30:41,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056344444] [2021-11-09 08:30:41,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056344444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:30:41,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:30:41,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:30:41,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513466834] [2021-11-09 08:30:41,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:30:41,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:30:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:30:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:30:41,497 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) [2021-11-09 08:30:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:30:59,498 INFO L93 Difference]: Finished difference Result 3575 states and 3928 transitions. [2021-11-09 08:30:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:30:59,499 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 [2021-11-09 08:30:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:30:59,507 INFO L225 Difference]: With dead ends: 3575 [2021-11-09 08:30:59,507 INFO L226 Difference]: Without dead ends: 3575 [2021-11-09 08:30:59,508 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:30:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2021-11-09 08:30:59,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 2433. [2021-11-09 08:30:59,547 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) [2021-11-09 08:30:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 2796 transitions. [2021-11-09 08:30:59,552 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 2796 transitions. Word has length 31 [2021-11-09 08:30:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:30:59,553 INFO L470 AbstractCegarLoop]: Abstraction has 2433 states and 2796 transitions. [2021-11-09 08:30:59,553 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) [2021-11-09 08:30:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 2796 transitions. [2021-11-09 08:30:59,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:30:59,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:30:59,555 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] [2021-11-09 08:30:59,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-09 08:30:59,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:30:59,769 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr372REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:30:59,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:30:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash 926454328, now seen corresponding path program 1 times [2021-11-09 08:30:59,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:30:59,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519477204] [2021-11-09 08:30:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:30:59,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:30:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:30:59,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:30:59,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 08:31:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:00,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:31:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:00,147 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 [2021-11-09 08:31:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:00,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:31:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:00,396 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:31:00,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519477204] [2021-11-09 08:31:00,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519477204] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:00,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:00,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:31:00,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549827970] [2021-11-09 08:31:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:00,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:31:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:00,399 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) [2021-11-09 08:31:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:08,306 INFO L93 Difference]: Finished difference Result 5058 states and 5640 transitions. [2021-11-09 08:31:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:31:08,307 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 [2021-11-09 08:31:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:08,318 INFO L225 Difference]: With dead ends: 5058 [2021-11-09 08:31:08,318 INFO L226 Difference]: Without dead ends: 5058 [2021-11-09 08:31:08,319 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 [2021-11-09 08:31:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2021-11-09 08:31:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 2430. [2021-11-09 08:31:08,390 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) [2021-11-09 08:31:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2785 transitions. [2021-11-09 08:31:08,396 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2785 transitions. Word has length 40 [2021-11-09 08:31:08,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:08,396 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2785 transitions. [2021-11-09 08:31:08,396 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) [2021-11-09 08:31:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2785 transitions. [2021-11-09 08:31:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:31:08,398 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:08,398 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] [2021-11-09 08:31:08,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:08,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:31:08,619 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr373REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:31:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash 926454329, now seen corresponding path program 1 times [2021-11-09 08:31:08,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:31:08,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857714669] [2021-11-09 08:31:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:08,620 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:31:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:31:08,622 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:31:08,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 08:31:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:31:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:09,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:31:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:09,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:31:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:10,025 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:31:10,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857714669] [2021-11-09 08:31:10,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857714669] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:10,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:10,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:31:10,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044949756] [2021-11-09 08:31:10,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:31:10,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:31:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:31:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:10,028 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) [2021-11-09 08:31:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:30,142 INFO L93 Difference]: Finished difference Result 5190 states and 5720 transitions. [2021-11-09 08:31:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:31:30,143 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 [2021-11-09 08:31:30,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:30,155 INFO L225 Difference]: With dead ends: 5190 [2021-11-09 08:31:30,155 INFO L226 Difference]: Without dead ends: 5190 [2021-11-09 08:31:30,155 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 [2021-11-09 08:31:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-11-09 08:31:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 2430. [2021-11-09 08:31:30,206 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) [2021-11-09 08:31:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2781 transitions. [2021-11-09 08:31:30,212 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2781 transitions. Word has length 40 [2021-11-09 08:31:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:30,212 INFO L470 AbstractCegarLoop]: Abstraction has 2430 states and 2781 transitions. [2021-11-09 08:31:30,213 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) [2021-11-09 08:31:30,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2781 transitions. [2021-11-09 08:31:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:31:30,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:30,214 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] [2021-11-09 08:31:30,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:31:30,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:31:30,427 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr54REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:31:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930120, now seen corresponding path program 1 times [2021-11-09 08:31:30,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:31:30,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629936003] [2021-11-09 08:31:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:30,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:31:30,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:31:30,430 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:31:30,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 08:31:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:30,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:31:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:30,851 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 [2021-11-09 08:31:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:30,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:31:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:31,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:31:31,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629936003] [2021-11-09 08:31:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629936003] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:31,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:31,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:31:31,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104556806] [2021-11-09 08:31:31,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:31:31,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:31:31,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:31:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:31:31,092 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) [2021-11-09 08:31:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:31:38,324 INFO L93 Difference]: Finished difference Result 4671 states and 5229 transitions. [2021-11-09 08:31:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:31:38,325 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 [2021-11-09 08:31:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:31:38,335 INFO L225 Difference]: With dead ends: 4671 [2021-11-09 08:31:38,336 INFO L226 Difference]: Without dead ends: 4671 [2021-11-09 08:31:38,336 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 [2021-11-09 08:31:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-11-09 08:31:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 2426. [2021-11-09 08:31:38,375 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) [2021-11-09 08:31:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 2777 transitions. [2021-11-09 08:31:38,380 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 2777 transitions. Word has length 40 [2021-11-09 08:31:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:31:38,380 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 2777 transitions. [2021-11-09 08:31:38,381 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) [2021-11-09 08:31:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 2777 transitions. [2021-11-09 08:31:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:31:38,382 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:31:38,382 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:31:38,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-09 08:31:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:31:38,595 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr55REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:31:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:31:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1060930119, now seen corresponding path program 1 times [2021-11-09 08:31:38,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:31:38,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4276344] [2021-11-09 08:31:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:31:38,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:31:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:31:38,598 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:31:38,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 08:31:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:31:39,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:31:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:31:39,055 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 [2021-11-09 08:31:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:39,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:31:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:31:39,844 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:31:39,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4276344] [2021-11-09 08:31:39,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4276344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:31:39,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:31:39,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:31:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145930476] [2021-11-09 08:31:39,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:31:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:31:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:31:39,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:31:39,846 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) [2021-11-09 08:32:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:01,257 INFO L93 Difference]: Finished difference Result 4579 states and 5017 transitions. [2021-11-09 08:32:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:32:01,258 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 [2021-11-09 08:32:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:01,267 INFO L225 Difference]: With dead ends: 4579 [2021-11-09 08:32:01,267 INFO L226 Difference]: Without dead ends: 4579 [2021-11-09 08:32:01,267 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 [2021-11-09 08:32:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2021-11-09 08:32:01,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 2422. [2021-11-09 08:32:01,307 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) [2021-11-09 08:32:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 2773 transitions. [2021-11-09 08:32:01,312 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 2773 transitions. Word has length 40 [2021-11-09 08:32:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:01,312 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 2773 transitions. [2021-11-09 08:32:01,312 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) [2021-11-09 08:32:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 2773 transitions. [2021-11-09 08:32:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:32:01,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:01,313 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] [2021-11-09 08:32:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:01,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:01,526 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:01,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1617899872, now seen corresponding path program 1 times [2021-11-09 08:32:01,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:01,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519430785] [2021-11-09 08:32:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:01,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:01,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:01,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:01,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 08:32:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:01,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:02,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:02,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:02,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:02,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519430785] [2021-11-09 08:32:02,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519430785] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:02,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:02,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:32:02,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915221844] [2021-11-09 08:32:02,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:02,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:02,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:02,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:02,237 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) [2021-11-09 08:32:02,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:02,302 INFO L93 Difference]: Finished difference Result 2416 states and 2759 transitions. [2021-11-09 08:32:02,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:02,302 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 [2021-11-09 08:32:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:02,307 INFO L225 Difference]: With dead ends: 2416 [2021-11-09 08:32:02,307 INFO L226 Difference]: Without dead ends: 2416 [2021-11-09 08:32:02,308 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 [2021-11-09 08:32:02,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-09 08:32:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-09 08:32:02,352 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) [2021-11-09 08:32:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 2759 transitions. [2021-11-09 08:32:02,356 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 2759 transitions. Word has length 44 [2021-11-09 08:32:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:02,357 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 2759 transitions. [2021-11-09 08:32:02,357 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) [2021-11-09 08:32:02,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 2759 transitions. [2021-11-09 08:32:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:32:02,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:02,359 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] [2021-11-09 08:32:02,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:02,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:02,579 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr704REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:02,580 INFO L85 PathProgramCache]: Analyzing trace with hash -357192108, now seen corresponding path program 1 times [2021-11-09 08:32:02,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:02,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843692018] [2021-11-09 08:32:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:02,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:02,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:02,581 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:02,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 08:32:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:03,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:03,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:03,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843692018] [2021-11-09 08:32:03,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843692018] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:03,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:03,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:32:03,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113030067] [2021-11-09 08:32:03,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:03,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:03,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:03,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:03,895 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) [2021-11-09 08:32:04,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:04,252 INFO L93 Difference]: Finished difference Result 3934 states and 4411 transitions. [2021-11-09 08:32:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:04,252 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 [2021-11-09 08:32:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:04,256 INFO L225 Difference]: With dead ends: 3934 [2021-11-09 08:32:04,256 INFO L226 Difference]: Without dead ends: 3934 [2021-11-09 08:32:04,257 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 [2021-11-09 08:32:04,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2021-11-09 08:32:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3135. [2021-11-09 08:32:04,300 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) [2021-11-09 08:32:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 4021 transitions. [2021-11-09 08:32:04,307 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 4021 transitions. Word has length 52 [2021-11-09 08:32:04,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:04,307 INFO L470 AbstractCegarLoop]: Abstraction has 3135 states and 4021 transitions. [2021-11-09 08:32:04,307 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) [2021-11-09 08:32:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 4021 transitions. [2021-11-09 08:32:04,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:32:04,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:04,309 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] [2021-11-09 08:32:04,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:04,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:04,522 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:04,523 INFO L85 PathProgramCache]: Analyzing trace with hash -964579511, now seen corresponding path program 1 times [2021-11-09 08:32:04,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:04,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704326239] [2021-11-09 08:32:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:04,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:04,524 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:04,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 08:32:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:05,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:05,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:05,346 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:05,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704326239] [2021-11-09 08:32:05,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704326239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:05,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:05,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:32:05,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299950035] [2021-11-09 08:32:05,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:05,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:05,348 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) [2021-11-09 08:32:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:05,412 INFO L93 Difference]: Finished difference Result 4463 states and 5423 transitions. [2021-11-09 08:32:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:05,413 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 [2021-11-09 08:32:05,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:05,417 INFO L225 Difference]: With dead ends: 4463 [2021-11-09 08:32:05,417 INFO L226 Difference]: Without dead ends: 4463 [2021-11-09 08:32:05,417 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 [2021-11-09 08:32:05,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4463 states. [2021-11-09 08:32:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4463 to 3111. [2021-11-09 08:32:05,464 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) [2021-11-09 08:32:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 3981 transitions. [2021-11-09 08:32:05,470 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 3981 transitions. Word has length 55 [2021-11-09 08:32:05,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:05,470 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 3981 transitions. [2021-11-09 08:32:05,471 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) [2021-11-09 08:32:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 3981 transitions. [2021-11-09 08:32:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:32:05,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:05,472 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] [2021-11-09 08:32:05,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:05,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:05,687 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr73REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:05,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:05,688 INFO L85 PathProgramCache]: Analyzing trace with hash -158828041, now seen corresponding path program 1 times [2021-11-09 08:32:05,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:05,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724943291] [2021-11-09 08:32:05,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:05,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:05,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:05,690 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:05,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-09 08:32:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:06,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:06,656 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:06,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724943291] [2021-11-09 08:32:06,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724943291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:06,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:32:06,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397867440] [2021-11-09 08:32:06,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:32:06,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:06,658 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) [2021-11-09 08:32:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:06,719 INFO L93 Difference]: Finished difference Result 4208 states and 4921 transitions. [2021-11-09 08:32:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:06,719 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 [2021-11-09 08:32:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:06,723 INFO L225 Difference]: With dead ends: 4208 [2021-11-09 08:32:06,723 INFO L226 Difference]: Without dead ends: 4208 [2021-11-09 08:32:06,723 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 [2021-11-09 08:32:06,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-11-09 08:32:06,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3099. [2021-11-09 08:32:06,759 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) [2021-11-09 08:32:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3099 states to 3099 states and 3961 transitions. [2021-11-09 08:32:06,766 INFO L78 Accepts]: Start accepts. Automaton has 3099 states and 3961 transitions. Word has length 58 [2021-11-09 08:32:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:06,766 INFO L470 AbstractCegarLoop]: Abstraction has 3099 states and 3961 transitions. [2021-11-09 08:32:06,766 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) [2021-11-09 08:32:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3099 states and 3961 transitions. [2021-11-09 08:32:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:32:06,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:06,768 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:06,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-09 08:32:06,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:06,982 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash 468734877, now seen corresponding path program 1 times [2021-11-09 08:32:06,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:06,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908156155] [2021-11-09 08:32:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:06,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:06,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:06,985 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:07,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-09 08:32:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:07,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:07,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:32:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:32:07,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:32:07,930 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 08:32:07,930 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 [2021-11-09 08:32:08,021 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 08:32:08,021 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 [2021-11-09 08:32:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:08,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:08,328 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:08,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908156155] [2021-11-09 08:32:08,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908156155] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:08,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:08,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 08:32:08,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034554735] [2021-11-09 08:32:08,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:08,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:08,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:08,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:32:08,331 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) [2021-11-09 08:32:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:12,201 INFO L93 Difference]: Finished difference Result 3327 states and 4200 transitions. [2021-11-09 08:32:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:32:12,202 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 [2021-11-09 08:32:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:12,205 INFO L225 Difference]: With dead ends: 3327 [2021-11-09 08:32:12,205 INFO L226 Difference]: Without dead ends: 3327 [2021-11-09 08:32:12,205 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 [2021-11-09 08:32:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-09 08:32:12,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3065. [2021-11-09 08:32:12,228 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) [2021-11-09 08:32:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 3926 transitions. [2021-11-09 08:32:12,234 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 3926 transitions. Word has length 61 [2021-11-09 08:32:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:12,235 INFO L470 AbstractCegarLoop]: Abstraction has 3065 states and 3926 transitions. [2021-11-09 08:32:12,235 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) [2021-11-09 08:32:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 3926 transitions. [2021-11-09 08:32:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 08:32:12,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:12,236 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:32:12,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-09 08:32:12,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:12,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr437REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash 73014525, now seen corresponding path program 1 times [2021-11-09 08:32:12,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:12,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509652005] [2021-11-09 08:32:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:12,465 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:12,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:12,466 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:12,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-09 08:32:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:13,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:32:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:13,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:14,343 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:14,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509652005] [2021-11-09 08:32:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509652005] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:14,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:14,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 08:32:14,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447859483] [2021-11-09 08:32:14,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 08:32:14,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:14,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 08:32:14,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 08:32:14,345 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) [2021-11-09 08:32:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:14,514 INFO L93 Difference]: Finished difference Result 4507 states and 5561 transitions. [2021-11-09 08:32:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 08:32:14,515 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 [2021-11-09 08:32:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:14,520 INFO L225 Difference]: With dead ends: 4507 [2021-11-09 08:32:14,520 INFO L226 Difference]: Without dead ends: 4507 [2021-11-09 08:32:14,520 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 [2021-11-09 08:32:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-11-09 08:32:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3788. [2021-11-09 08:32:14,595 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) [2021-11-09 08:32:14,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 5151 transitions. [2021-11-09 08:32:14,603 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 5151 transitions. Word has length 63 [2021-11-09 08:32:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:14,604 INFO L470 AbstractCegarLoop]: Abstraction has 3788 states and 5151 transitions. [2021-11-09 08:32:14,604 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) [2021-11-09 08:32:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 5151 transitions. [2021-11-09 08:32:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:32:14,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:14,605 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] [2021-11-09 08:32:14,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:14,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:14,822 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr391REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:14,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1815743939, now seen corresponding path program 1 times [2021-11-09 08:32:14,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:14,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940626966] [2021-11-09 08:32:14,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:14,823 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:14,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:14,825 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:14,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-09 08:32:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:15,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:32:15,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:15,845 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 [2021-11-09 08:32:15,850 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 [2021-11-09 08:32:16,711 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 08:32:16,712 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 [2021-11-09 08:32:16,721 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:32:16,722 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 [2021-11-09 08:32:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:21,959 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:21,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940626966] [2021-11-09 08:32:21,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940626966] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:21,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:21,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 08:32:21,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137433717] [2021-11-09 08:32:21,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:32:21,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:21,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:32:21,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 08:32:21,961 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) [2021-11-09 08:32:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:57,211 INFO L93 Difference]: Finished difference Result 6730 states and 9145 transitions. [2021-11-09 08:32:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 08:32:57,212 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 [2021-11-09 08:32:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:32:57,221 INFO L225 Difference]: With dead ends: 6730 [2021-11-09 08:32:57,221 INFO L226 Difference]: Without dead ends: 6730 [2021-11-09 08:32:57,221 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 [2021-11-09 08:32:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6730 states. [2021-11-09 08:32:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6730 to 3732. [2021-11-09 08:32:57,280 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) [2021-11-09 08:32:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 5011 transitions. [2021-11-09 08:32:57,288 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 5011 transitions. Word has length 66 [2021-11-09 08:32:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:32:57,288 INFO L470 AbstractCegarLoop]: Abstraction has 3732 states and 5011 transitions. [2021-11-09 08:32:57,289 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) [2021-11-09 08:32:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 5011 transitions. [2021-11-09 08:32:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:32:57,290 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:32:57,290 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] [2021-11-09 08:32:57,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:57,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:32:57,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr396REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:32:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -407756336, now seen corresponding path program 1 times [2021-11-09 08:32:57,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:32:57,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153365255] [2021-11-09 08:32:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:57,507 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:32:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:32:57,508 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:32:57,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-09 08:32:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:58,438 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 [2021-11-09 08:32:58,453 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 [2021-11-09 08:32:58,522 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 [2021-11-09 08:32:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:58,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:32:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:58,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:32:58,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153365255] [2021-11-09 08:32:58,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153365255] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:58,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:58,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:32:58,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174574698] [2021-11-09 08:32:58,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:32:58,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:32:58,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:32:58,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:32:58,714 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) [2021-11-09 08:33:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:05,858 INFO L93 Difference]: Finished difference Result 3731 states and 5008 transitions. [2021-11-09 08:33:05,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:05,859 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 [2021-11-09 08:33:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:05,862 INFO L225 Difference]: With dead ends: 3731 [2021-11-09 08:33:05,862 INFO L226 Difference]: Without dead ends: 3731 [2021-11-09 08:33:05,862 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 [2021-11-09 08:33:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-11-09 08:33:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3731. [2021-11-09 08:33:05,898 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) [2021-11-09 08:33:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5008 transitions. [2021-11-09 08:33:05,903 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5008 transitions. Word has length 71 [2021-11-09 08:33:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:05,904 INFO L470 AbstractCegarLoop]: Abstraction has 3731 states and 5008 transitions. [2021-11-09 08:33:05,904 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) [2021-11-09 08:33:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5008 transitions. [2021-11-09 08:33:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:33:05,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:05,908 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] [2021-11-09 08:33:05,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:06,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:33:06,124 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr397REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:33:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:06,125 INFO L85 PathProgramCache]: Analyzing trace with hash -407756335, now seen corresponding path program 1 times [2021-11-09 08:33:06,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:06,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490296960] [2021-11-09 08:33:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:06,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:06,127 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:06,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-09 08:33:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:33:06,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:07,135 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 [2021-11-09 08:33:07,144 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 [2021-11-09 08:33:07,208 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 [2021-11-09 08:33:07,213 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 [2021-11-09 08:33:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:07,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:07,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:07,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490296960] [2021-11-09 08:33:07,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490296960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:07,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:07,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 08:33:07,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679487391] [2021-11-09 08:33:07,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:07,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:07,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:07,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:07,595 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) [2021-11-09 08:33:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:29,466 INFO L93 Difference]: Finished difference Result 3730 states and 5005 transitions. [2021-11-09 08:33:29,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:29,467 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 [2021-11-09 08:33:29,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:29,472 INFO L225 Difference]: With dead ends: 3730 [2021-11-09 08:33:29,472 INFO L226 Difference]: Without dead ends: 3730 [2021-11-09 08:33:29,472 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 [2021-11-09 08:33:29,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3730 states. [2021-11-09 08:33:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3730 to 3730. [2021-11-09 08:33:29,502 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) [2021-11-09 08:33:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3730 states to 3730 states and 5005 transitions. [2021-11-09 08:33:29,507 INFO L78 Accepts]: Start accepts. Automaton has 3730 states and 5005 transitions. Word has length 71 [2021-11-09 08:33:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:29,507 INFO L470 AbstractCegarLoop]: Abstraction has 3730 states and 5005 transitions. [2021-11-09 08:33:29,507 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) [2021-11-09 08:33:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3730 states and 5005 transitions. [2021-11-09 08:33:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:33:29,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:29,508 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] [2021-11-09 08:33:29,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:29,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:33:29,715 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr78REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:33:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:29,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255012, now seen corresponding path program 1 times [2021-11-09 08:33:29,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:29,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503245045] [2021-11-09 08:33:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:29,716 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:29,717 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:29,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-09 08:33:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:30,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:33:30,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:30,702 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 [2021-11-09 08:33:30,715 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 [2021-11-09 08:33:30,754 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 [2021-11-09 08:33:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:30,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:30,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:30,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503245045] [2021-11-09 08:33:30,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503245045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:30,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:30,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 08:33:30,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663131691] [2021-11-09 08:33:30,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:33:30,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:30,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:33:30,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:33:30,930 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) [2021-11-09 08:33:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:38,265 INFO L93 Difference]: Finished difference Result 3729 states and 5003 transitions. [2021-11-09 08:33:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:33:38,266 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 [2021-11-09 08:33:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:38,269 INFO L225 Difference]: With dead ends: 3729 [2021-11-09 08:33:38,269 INFO L226 Difference]: Without dead ends: 3729 [2021-11-09 08:33:38,269 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 [2021-11-09 08:33:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-11-09 08:33:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3729. [2021-11-09 08:33:38,308 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) [2021-11-09 08:33:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3729 states to 3729 states and 5003 transitions. [2021-11-09 08:33:38,313 INFO L78 Accepts]: Start accepts. Automaton has 3729 states and 5003 transitions. Word has length 71 [2021-11-09 08:33:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:38,313 INFO L470 AbstractCegarLoop]: Abstraction has 3729 states and 5003 transitions. [2021-11-09 08:33:38,314 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) [2021-11-09 08:33:38,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3729 states and 5003 transitions. [2021-11-09 08:33:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:33:38,315 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:38,315 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] [2021-11-09 08:33:38,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:38,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:33:38,532 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr79REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:33:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:38,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1405255013, now seen corresponding path program 1 times [2021-11-09 08:33:38,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:33:38,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101552637] [2021-11-09 08:33:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:38,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:33:38,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:33:38,534 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:33:38,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-09 08:33:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:39,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:33:39,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:39,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:33:39,583 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 [2021-11-09 08:33:39,593 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 [2021-11-09 08:33:39,654 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 [2021-11-09 08:33:39,663 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 [2021-11-09 08:33:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:39,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:33:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:40,102 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:33:40,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101552637] [2021-11-09 08:33:40,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101552637] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:40,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:40,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 08:33:40,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808268613] [2021-11-09 08:33:40,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:33:40,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:33:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:33:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:33:40,106 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) [2021-11-09 08:34:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:03,390 INFO L93 Difference]: Finished difference Result 3728 states and 5001 transitions. [2021-11-09 08:34:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:34:03,391 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 [2021-11-09 08:34:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:03,395 INFO L225 Difference]: With dead ends: 3728 [2021-11-09 08:34:03,396 INFO L226 Difference]: Without dead ends: 3728 [2021-11-09 08:34:03,396 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 [2021-11-09 08:34:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-11-09 08:34:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 3728. [2021-11-09 08:34:03,430 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) [2021-11-09 08:34:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5001 transitions. [2021-11-09 08:34:03,436 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5001 transitions. Word has length 71 [2021-11-09 08:34:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:03,436 INFO L470 AbstractCegarLoop]: Abstraction has 3728 states and 5001 transitions. [2021-11-09 08:34:03,437 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) [2021-11-09 08:34:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5001 transitions. [2021-11-09 08:34:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 08:34:03,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:03,439 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] [2021-11-09 08:34:03,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:03,655 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:34:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:03,655 INFO L85 PathProgramCache]: Analyzing trace with hash 491384311, now seen corresponding path program 1 times [2021-11-09 08:34:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:03,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023091648] [2021-11-09 08:34:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:03,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:03,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:03,658 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:03,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-09 08:34:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 08:34:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:04,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:05,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:05,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023091648] [2021-11-09 08:34:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023091648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 08:34:05,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:34:05,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 08:34:05,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389754322] [2021-11-09 08:34:05,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 08:34:05,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 08:34:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:34:05,134 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) [2021-11-09 08:34:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:05,301 INFO L93 Difference]: Finished difference Result 3738 states and 5017 transitions. [2021-11-09 08:34:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:34:05,302 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 [2021-11-09 08:34:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:05,308 INFO L225 Difference]: With dead ends: 3738 [2021-11-09 08:34:05,309 INFO L226 Difference]: Without dead ends: 3738 [2021-11-09 08:34:05,309 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 [2021-11-09 08:34:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2021-11-09 08:34:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3738. [2021-11-09 08:34:05,353 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) [2021-11-09 08:34:05,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 5017 transitions. [2021-11-09 08:34:05,360 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 5017 transitions. Word has length 79 [2021-11-09 08:34:05,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:05,360 INFO L470 AbstractCegarLoop]: Abstraction has 3738 states and 5017 transitions. [2021-11-09 08:34:05,361 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) [2021-11-09 08:34:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 5017 transitions. [2021-11-09 08:34:05,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-09 08:34:05,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:05,362 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] [2021-11-09 08:34:05,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:05,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:05,578 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:34:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash -787144713, now seen corresponding path program 1 times [2021-11-09 08:34:05,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:05,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585962269] [2021-11-09 08:34:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:05,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:05,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:05,580 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:05,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-09 08:34:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:06,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:34:06,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 08:34:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:07,094 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 08:34:07,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585962269] [2021-11-09 08:34:07,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585962269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 08:34:07,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:07,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 08:34:07,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968122783] [2021-11-09 08:34:07,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:34:07,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 08:34:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:34:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:34:07,096 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) [2021-11-09 08:34:07,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:07,651 INFO L93 Difference]: Finished difference Result 3752 states and 5041 transitions. [2021-11-09 08:34:07,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:34:07,652 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 [2021-11-09 08:34:07,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:07,660 INFO L225 Difference]: With dead ends: 3752 [2021-11-09 08:34:07,661 INFO L226 Difference]: Without dead ends: 3748 [2021-11-09 08:34:07,662 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 [2021-11-09 08:34:07,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-09 08:34:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3744. [2021-11-09 08:34:07,715 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) [2021-11-09 08:34:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5025 transitions. [2021-11-09 08:34:07,723 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5025 transitions. Word has length 81 [2021-11-09 08:34:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:07,724 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5025 transitions. [2021-11-09 08:34:07,724 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) [2021-11-09 08:34:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5025 transitions. [2021-11-09 08:34:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-09 08:34:07,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:07,725 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] [2021-11-09 08:34:07,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 08:34:07,944 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr400REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 1189 more)] === [2021-11-09 08:34:07,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:07,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1438516215, now seen corresponding path program 2 times [2021-11-09 08:34:07,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 08:34:07,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845287391] [2021-11-09 08:34:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:07,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 08:34:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 08:34:07,946 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 08:34:07,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad881132-f201-4b84-a9cf-834fd0f9de67/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-09 08:34:09,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 08:34:09,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:09,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 08:34:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:09,137 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 [2021-11-09 08:34:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:34:09,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:34:09,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:34:09,222 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 08:34:09,222 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 [2021-11-09 08:34:09,325 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:34:09,325 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 [2021-11-09 08:34:09,582 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-09 08:34:09,582 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 [2021-11-09 08:34:15,019 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-09 08:34:15,019 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 [2021-11-09 08:34:24,962 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-09 08:34:24,962 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 [2021-11-09 08:34:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:34:25,200 INFO L328 TraceCheckSpWp]: Computing backward predicates...