./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:36:08,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:36:08,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:36:08,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:36:08,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:36:08,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:36:08,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:36:08,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:36:08,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:36:08,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:36:08,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:36:08,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:36:08,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:36:08,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:36:08,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:36:08,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:36:08,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:36:08,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:36:08,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:36:08,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:36:08,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:36:09,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:36:09,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:36:09,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:36:09,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:36:09,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:36:09,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:36:09,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:36:09,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:36:09,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:36:09,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:36:09,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:36:09,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:36:09,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:36:09,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:36:09,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:36:09,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:36:09,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:36:09,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:36:09,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:36:09,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:36:09,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:36:09,079 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:36:09,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:36:09,082 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:36:09,082 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:36:09,090 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:36:09,090 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:36:09,091 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:36:09,091 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:36:09,091 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:36:09,092 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:36:09,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:36:09,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:36:09,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:36:09,094 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:36:09,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:36:09,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:36:09,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:36:09,095 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:36:09,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:36:09,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:36:09,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:36:09,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:36:09,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:36:09,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:09,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:36:09,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:36:09,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:36:09,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:36:09,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:36:09,099 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 [2021-11-09 09:36:09,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:36:09,428 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:36:09,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:36:09,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:36:09,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:36:09,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-09 09:36:09,508 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/0e0a89d9f/78be7777b23a4d78abf487a1d0bde0c4/FLAG32e61576e [2021-11-09 09:36:10,097 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:36:10,097 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-09 09:36:10,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/0e0a89d9f/78be7777b23a4d78abf487a1d0bde0c4/FLAG32e61576e [2021-11-09 09:36:10,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/0e0a89d9f/78be7777b23a4d78abf487a1d0bde0c4 [2021-11-09 09:36:10,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:36:10,363 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:36:10,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:10,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:36:10,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:36:10,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:10" (1/1) ... [2021-11-09 09:36:10,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd6007e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:10, skipping insertion in model container [2021-11-09 09:36:10,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:10" (1/1) ... [2021-11-09 09:36:10,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:36:10,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:10,888 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-09 09:36:11,028 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-09 09:36:11,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:11,076 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 09:36:11,077 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4292d309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:11, skipping insertion in model container [2021-11-09 09:36:11,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:11,077 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 09:36:11,079 INFO L168 Benchmark]: Toolchain (without parser) took 715.32 ms. Allocated memory is still 100.7 MB. Free memory was 62.7 MB in the beginning and 63.8 MB in the end (delta: -1.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:36:11,080 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 74.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:36:11,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.52 ms. Allocated memory is still 100.7 MB. Free memory was 62.5 MB in the beginning and 63.8 MB in the end (delta: -1.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 09:36:11,083 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 100.7 MB. Free memory was 74.5 MB in the beginning and 74.5 MB in the end (delta: 29.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 706.52 ms. Allocated memory is still 100.7 MB. Free memory was 62.5 MB in the beginning and 63.8 MB in the end (delta: -1.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:36:13,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:36:13,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:36:13,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:36:13,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:36:13,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:36:13,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:36:13,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:36:13,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:36:13,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:36:13,332 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:36:13,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:36:13,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:36:13,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:36:13,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:36:13,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:36:13,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:36:13,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:36:13,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:36:13,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:36:13,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:36:13,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:36:13,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:36:13,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:36:13,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:36:13,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:36:13,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:36:13,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:36:13,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:36:13,375 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:36:13,375 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:36:13,376 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:36:13,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:36:13,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:36:13,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:36:13,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:36:13,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:36:13,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:36:13,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:36:13,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:36:13,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:36:13,388 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 09:36:13,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:36:13,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:36:13,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:36:13,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:36:13,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:36:13,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:36:13,437 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:36:13,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:36:13,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:36:13,438 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:36:13,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:36:13,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:36:13,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:36:13,439 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:36:13,440 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:36:13,440 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:36:13,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:36:13,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:36:13,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 09:36:13,441 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 09:36:13,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:36:13,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:36:13,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:36:13,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:36:13,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:36:13,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:13,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:36:13,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:36:13,442 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 09:36:13,443 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 09:36:13,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:36:13,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 09:36:13,443 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6560568361eacef24363f4e5a58f5226b4c8bc2851167e042d4f8ce61eb0aa48 [2021-11-09 09:36:13,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:36:13,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:36:13,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:36:13,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:36:13,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:36:13,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-09 09:36:13,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/4871a1586/40dbb876e55a4c0b89d1239259c58d3b/FLAGcebf44b37 [2021-11-09 09:36:14,686 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:36:14,686 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i [2021-11-09 09:36:14,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/4871a1586/40dbb876e55a4c0b89d1239259c58d3b/FLAGcebf44b37 [2021-11-09 09:36:14,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/data/4871a1586/40dbb876e55a4c0b89d1239259c58d3b [2021-11-09 09:36:14,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:36:14,926 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:36:14,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:14,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:36:14,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:36:14,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:14" (1/1) ... [2021-11-09 09:36:14,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac19e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:14, skipping insertion in model container [2021-11-09 09:36:14,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:14" (1/1) ... [2021-11-09 09:36:14,946 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:36:15,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:15,517 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-09 09:36:15,639 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-09 09:36:15,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:15,690 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 09:36:15,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:15,733 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-09 09:36:15,840 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-09 09:36:15,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:15,857 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:36:15,909 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[33021,33034] [2021-11-09 09:36:16,013 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_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test3-2.i[44590,44603] [2021-11-09 09:36:16,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:16,072 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:36:16,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16 WrapperNode [2021-11-09 09:36:16,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:16,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:36:16,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:36:16,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:36:16,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:36:16,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:36:16,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:36:16,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:36:16,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (1/1) ... [2021-11-09 09:36:16,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:16,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:36:16,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:36:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:36:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:36:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 09:36:16,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 09:36:16,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 09:36:16,363 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 09:36:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 09:36:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 09:36:16,364 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 09:36:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-09 09:36:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-11-09 09:36:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:36:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-09 09:36:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-09 09:36:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-09 09:36:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-09 09:36:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-09 09:36:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-09 09:36:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-09 09:36:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-09 09:36:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-09 09:36:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-09 09:36:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-09 09:36:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-09 09:36:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-09 09:36:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-09 09:36:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-09 09:36:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-09 09:36:16,369 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-09 09:36:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-09 09:36:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-09 09:36:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-09 09:36:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-09 09:36:16,371 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-09 09:36:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-09 09:36:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-09 09:36:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-09 09:36:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-09 09:36:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-09 09:36:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-09 09:36:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-09 09:36:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-09 09:36:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-09 09:36:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-09 09:36:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-09 09:36:16,375 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-09 09:36:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-09 09:36:16,376 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-09 09:36:16,377 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-09 09:36:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-09 09:36:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-09 09:36:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-09 09:36:16,378 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-09 09:36:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-09 09:36:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 09:36:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 09:36:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 09:36:16,379 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 09:36:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 09:36:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 09:36:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 09:36:16,380 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 09:36:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 09:36:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 09:36:16,381 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 09:36:16,382 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 09:36:16,383 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 09:36:16,384 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 09:36:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 09:36:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 09:36:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 09:36:16,385 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 09:36:16,386 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 09:36:16,387 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 09:36:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 09:36:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 09:36:16,388 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 09:36:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 09:36:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 09:36:16,389 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 09:36:16,390 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 09:36:16,393 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 09:36:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:36:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 09:36:16,394 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 09:36:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:36:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 09:36:16,395 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 09:36:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 09:36:16,396 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 09:36:16,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 09:36:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 09:36:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 09:36:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 09:36:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 09:36:16,402 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 09:36:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 09:36:16,403 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 09:36:16,404 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 09:36:16,405 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 09:36:16,406 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 09:36:16,407 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 09:36:16,408 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:36:16,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 09:36:16,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:36:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:36:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-09 09:36:16,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:36:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:36:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 09:36:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:36:16,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 09:36:16,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 09:36:17,090 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 09:36:22,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:36:22,625 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-09 09:36:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:22 BoogieIcfgContainer [2021-11-09 09:36:22,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:36:22,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:36:22,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:36:22,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:36:22,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:36:14" (1/3) ... [2021-11-09 09:36:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c2601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:22, skipping insertion in model container [2021-11-09 09:36:22,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:16" (2/3) ... [2021-11-09 09:36:22,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210c2601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:22, skipping insertion in model container [2021-11-09 09:36:22,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:22" (3/3) ... [2021-11-09 09:36:22,639 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test3-2.i [2021-11-09 09:36:22,644 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:36:22,645 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 639 error locations. [2021-11-09 09:36:22,700 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:36:22,710 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 09:36:22,711 INFO L340 AbstractCegarLoop]: Starting to check reachability of 639 error locations. [2021-11-09 09:36:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 1279 states, 626 states have (on average 2.253993610223642) internal successors, (1411), 1267 states have internal predecessors, (1411), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:36:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:36:22,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:22,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:22,781 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:22,787 INFO L85 PathProgramCache]: Analyzing trace with hash 806083998, now seen corresponding path program 1 times [2021-11-09 09:36:22,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:22,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899254685] [2021-11-09 09:36:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:22,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:22,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:22,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 09:36:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:36:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:23,216 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 09:36:23,227 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 09:36:23,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:23,276 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 09:36:23,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:23,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899254685] [2021-11-09 09:36:23,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899254685] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:23,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:23,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:36:23,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371739196] [2021-11-09 09:36:23,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:23,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:23,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:23,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:23,304 INFO L87 Difference]: Start difference. First operand has 1279 states, 626 states have (on average 2.253993610223642) internal successors, (1411), 1267 states have internal predecessors, (1411), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:25,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:25,967 INFO L93 Difference]: Finished difference Result 1451 states and 1536 transitions. [2021-11-09 09:36:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:25,969 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 09:36:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:25,997 INFO L225 Difference]: With dead ends: 1451 [2021-11-09 09:36:25,997 INFO L226 Difference]: Without dead ends: 1448 [2021-11-09 09:36:25,999 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 09:36:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1448 states. [2021-11-09 09:36:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1448 to 1263. [2021-11-09 09:36:26,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 626 states have (on average 2.1070287539936103) internal successors, (1319), 1252 states have internal predecessors, (1319), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1340 transitions. [2021-11-09 09:36:26,148 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1340 transitions. Word has length 7 [2021-11-09 09:36:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:26,149 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 1340 transitions. [2021-11-09 09:36:26,149 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 09:36:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1340 transitions. [2021-11-09 09:36:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:36:26,150 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:26,150 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:26,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:26,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:26,364 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash 806083999, now seen corresponding path program 1 times [2021-11-09 09:36:26,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:26,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709068080] [2021-11-09 09:36:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:26,366 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:26,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:26,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:26,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 09:36:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:26,624 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 09:36:26,640 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 09:36:26,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:26,712 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 09:36:26,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:26,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709068080] [2021-11-09 09:36:26,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709068080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:26,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:26,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 09:36:26,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512736990] [2021-11-09 09:36:26,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:26,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:26,720 INFO L87 Difference]: Start difference. First operand 1263 states and 1340 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:32,890 INFO L93 Difference]: Finished difference Result 1936 states and 2058 transitions. [2021-11-09 09:36:32,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:32,891 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 09:36:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:32,901 INFO L225 Difference]: With dead ends: 1936 [2021-11-09 09:36:32,901 INFO L226 Difference]: Without dead ends: 1936 [2021-11-09 09:36:32,902 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 09:36:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-11-09 09:36:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1298. [2021-11-09 09:36:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 670 states have (on average 2.0865671641791046) internal successors, (1398), 1287 states have internal predecessors, (1398), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:32,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1419 transitions. [2021-11-09 09:36:32,968 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1419 transitions. Word has length 7 [2021-11-09 09:36:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:32,969 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1419 transitions. [2021-11-09 09:36:32,970 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 09:36:32,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1419 transitions. [2021-11-09 09:36:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:36:32,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:32,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:32,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:33,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:33,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:33,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:33,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1330049549, now seen corresponding path program 1 times [2021-11-09 09:36:33,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:33,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424743107] [2021-11-09 09:36:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:33,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:33,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:33,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 09:36:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:36:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:33,446 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 09:36:33,464 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 09:36:33,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:33,501 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 09:36:33,502 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:33,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424743107] [2021-11-09 09:36:33,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424743107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:33,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:33,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 09:36:33,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49225687] [2021-11-09 09:36:33,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:36:33,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:33,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:36:33,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:36:33,512 INFO L87 Difference]: Start difference. First operand 1298 states and 1419 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:35,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:35,888 INFO L93 Difference]: Finished difference Result 1626 states and 1772 transitions. [2021-11-09 09:36:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:35,890 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 09:36:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:35,896 INFO L225 Difference]: With dead ends: 1626 [2021-11-09 09:36:35,897 INFO L226 Difference]: Without dead ends: 1626 [2021-11-09 09:36:35,897 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 09:36:35,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-09 09:36:35,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1249. [2021-11-09 09:36:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 670 states have (on average 2.008955223880597) internal successors, (1346), 1238 states have internal predecessors, (1346), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1367 transitions. [2021-11-09 09:36:35,937 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1367 transitions. Word has length 12 [2021-11-09 09:36:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:35,937 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1367 transitions. [2021-11-09 09:36:35,937 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 09:36:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1367 transitions. [2021-11-09 09:36:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:36:35,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:35,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:35,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:36,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:36,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:36,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1330049550, now seen corresponding path program 1 times [2021-11-09 09:36:36,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:36,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1955792549] [2021-11-09 09:36:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:36,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:36,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:36,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 09:36:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:36,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:36,389 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 09:36:36,433 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 09:36:36,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:36,552 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 09:36:36,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:36,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1955792549] [2021-11-09 09:36:36,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1955792549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:36,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:36,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 09:36:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847348021] [2021-11-09 09:36:36,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:36,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:36,557 INFO L87 Difference]: Start difference. First operand 1249 states and 1367 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:42,301 INFO L93 Difference]: Finished difference Result 1669 states and 1779 transitions. [2021-11-09 09:36:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:42,302 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 09:36:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:42,311 INFO L225 Difference]: With dead ends: 1669 [2021-11-09 09:36:42,312 INFO L226 Difference]: Without dead ends: 1669 [2021-11-09 09:36:42,312 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 09:36:42,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-11-09 09:36:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1239. [2021-11-09 09:36:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 670 states have (on average 1.98955223880597) internal successors, (1333), 1228 states have internal predecessors, (1333), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1354 transitions. [2021-11-09 09:36:42,348 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1354 transitions. Word has length 12 [2021-11-09 09:36:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:42,349 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1354 transitions. [2021-11-09 09:36:42,349 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 09:36:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1354 transitions. [2021-11-09 09:36:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:36:42,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:42,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:42,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:42,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:42,568 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr526REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1636070505, now seen corresponding path program 1 times [2021-11-09 09:36:42,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:42,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583399809] [2021-11-09 09:36:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:42,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:42,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:42,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:42,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 09:36:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:36:42,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:42,865 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 09:36:42,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:42,963 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 09:36:42,963 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:42,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583399809] [2021-11-09 09:36:42,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583399809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:42,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:42,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 09:36:42,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544297875] [2021-11-09 09:36:42,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:42,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:42,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:42,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:42,966 INFO L87 Difference]: Start difference. First operand 1239 states and 1354 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:44,084 INFO L93 Difference]: Finished difference Result 1881 states and 2038 transitions. [2021-11-09 09:36:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-09 09:36:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:44,097 INFO L225 Difference]: With dead ends: 1881 [2021-11-09 09:36:44,097 INFO L226 Difference]: Without dead ends: 1881 [2021-11-09 09:36:44,098 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-09 09:36:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1479. [2021-11-09 09:36:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 910 states have (on average 1.9637362637362636) internal successors, (1787), 1468 states have internal predecessors, (1787), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1808 transitions. [2021-11-09 09:36:44,150 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1808 transitions. Word has length 15 [2021-11-09 09:36:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:44,150 INFO L470 AbstractCegarLoop]: Abstraction has 1479 states and 1808 transitions. [2021-11-09 09:36:44,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:44,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1808 transitions. [2021-11-09 09:36:44,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:36:44,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:44,152 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 09:36:44,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:44,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:44,367 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr340REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash -271696847, now seen corresponding path program 1 times [2021-11-09 09:36:44,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:44,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390083801] [2021-11-09 09:36:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:44,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:44,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:44,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:44,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 09:36:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:44,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:36:44,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:44,626 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 09:36:44,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:44,681 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 09:36:44,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:44,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390083801] [2021-11-09 09:36:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390083801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:44,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 09:36:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303493532] [2021-11-09 09:36:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:44,684 INFO L87 Difference]: Start difference. First operand 1479 states and 1808 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:44,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:44,720 INFO L93 Difference]: Finished difference Result 1649 states and 1966 transitions. [2021-11-09 09:36:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:44,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-09 09:36:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:44,730 INFO L225 Difference]: With dead ends: 1649 [2021-11-09 09:36:44,730 INFO L226 Difference]: Without dead ends: 1649 [2021-11-09 09:36:44,731 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-11-09 09:36:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1419. [2021-11-09 09:36:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 874 states have (on average 1.9462242562929062) internal successors, (1701), 1408 states have internal predecessors, (1701), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 1722 transitions. [2021-11-09 09:36:44,769 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 1722 transitions. Word has length 17 [2021-11-09 09:36:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 1722 transitions. [2021-11-09 09:36:44,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 1722 transitions. [2021-11-09 09:36:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:36:44,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:44,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:44,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-09 09:36:44,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:44,984 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr364REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash 892362763, now seen corresponding path program 1 times [2021-11-09 09:36:44,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:44,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240355579] [2021-11-09 09:36:44,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:44,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:44,988 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:45,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 09:36:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:45,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:45,352 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 09:36:45,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:45,435 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 09:36:45,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:45,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240355579] [2021-11-09 09:36:45,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1240355579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:45,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:45,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 09:36:45,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856133431] [2021-11-09 09:36:45,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:45,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:45,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:45,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:45,438 INFO L87 Difference]: Start difference. First operand 1419 states and 1722 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:45,525 INFO L93 Difference]: Finished difference Result 1621 states and 1910 transitions. [2021-11-09 09:36:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:45,526 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-09 09:36:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:45,535 INFO L225 Difference]: With dead ends: 1621 [2021-11-09 09:36:45,536 INFO L226 Difference]: Without dead ends: 1621 [2021-11-09 09:36:45,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:45,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-11-09 09:36:45,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1389. [2021-11-09 09:36:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 858 states have (on average 1.9149184149184149) internal successors, (1643), 1378 states have internal predecessors, (1643), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1664 transitions. [2021-11-09 09:36:45,570 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1664 transitions. Word has length 19 [2021-11-09 09:36:45,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:45,571 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 1664 transitions. [2021-11-09 09:36:45,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:45,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1664 transitions. [2021-11-09 09:36:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:36:45,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:45,572 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:45,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:45,788 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr637ENSURES_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1468583665, now seen corresponding path program 1 times [2021-11-09 09:36:45,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:45,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941984289] [2021-11-09 09:36:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:45,789 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:45,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:45,789 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:45,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 09:36:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:46,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:36:46,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:36:46,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:36:46,129 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 09:36:46,129 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 09:36:46,196 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 09:36:46,196 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 09:36:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:46,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:46,342 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 09:36:46,342 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:46,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941984289] [2021-11-09 09:36:46,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941984289] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:46,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:46,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 09:36:46,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322674282] [2021-11-09 09:36:46,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:46,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:46,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:46,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:46,344 INFO L87 Difference]: Start difference. First operand 1389 states and 1664 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:48,397 INFO L93 Difference]: Finished difference Result 1832 states and 2168 transitions. [2021-11-09 09:36:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 09:36:48,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:48,407 INFO L225 Difference]: With dead ends: 1832 [2021-11-09 09:36:48,407 INFO L226 Difference]: Without dead ends: 1832 [2021-11-09 09:36:48,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:36:48,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-11-09 09:36:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1388. [2021-11-09 09:36:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 857 states have (on average 1.9148191365227538) internal successors, (1641), 1377 states have internal predecessors, (1641), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1662 transitions. [2021-11-09 09:36:48,440 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1662 transitions. Word has length 20 [2021-11-09 09:36:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:48,440 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 1662 transitions. [2021-11-09 09:36:48,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1662 transitions. [2021-11-09 09:36:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 09:36:48,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:48,442 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:48,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:48,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:48,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:48,661 INFO L85 PathProgramCache]: Analyzing trace with hash 833916409, now seen corresponding path program 1 times [2021-11-09 09:36:48,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:48,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532870570] [2021-11-09 09:36:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:48,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:48,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:48,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:48,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 09:36:48,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 09:36:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:48,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:49,031 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 09:36:49,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:49,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532870570] [2021-11-09 09:36:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532870570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:49,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:49,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 09:36:49,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226948021] [2021-11-09 09:36:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:49,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:49,035 INFO L87 Difference]: Start difference. First operand 1388 states and 1662 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:49,075 INFO L93 Difference]: Finished difference Result 1328 states and 1576 transitions. [2021-11-09 09:36:49,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:36:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-09 09:36:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:49,084 INFO L225 Difference]: With dead ends: 1328 [2021-11-09 09:36:49,084 INFO L226 Difference]: Without dead ends: 1328 [2021-11-09 09:36:49,084 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-11-09 09:36:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1328. [2021-11-09 09:36:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 821 states have (on average 1.8940316686967114) internal successors, (1555), 1317 states have internal predecessors, (1555), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1576 transitions. [2021-11-09 09:36:49,115 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1576 transitions. Word has length 22 [2021-11-09 09:36:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:49,115 INFO L470 AbstractCegarLoop]: Abstraction has 1328 states and 1576 transitions. [2021-11-09 09:36:49,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1576 transitions. [2021-11-09 09:36:49,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:36:49,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:49,118 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 09:36:49,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:49,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:49,330 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr38REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1765216397, now seen corresponding path program 1 times [2021-11-09 09:36:49,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:49,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416199553] [2021-11-09 09:36:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:49,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:49,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:49,332 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:49,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 09:36:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:49,699 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 09:36:49,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:49,768 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:49,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416199553] [2021-11-09 09:36:49,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416199553] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:49,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:49,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 09:36:49,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813448630] [2021-11-09 09:36:49,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:49,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:49,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:49,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:49,770 INFO L87 Difference]: Start difference. First operand 1328 states and 1576 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:49,834 INFO L93 Difference]: Finished difference Result 1300 states and 1520 transitions. [2021-11-09 09:36:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-09 09:36:49,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:49,849 INFO L225 Difference]: With dead ends: 1300 [2021-11-09 09:36:49,849 INFO L226 Difference]: Without dead ends: 1300 [2021-11-09 09:36:49,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:49,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-11-09 09:36:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1298. [2021-11-09 09:36:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 805 states have (on average 1.8596273291925465) internal successors, (1497), 1287 states have internal predecessors, (1497), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1518 transitions. [2021-11-09 09:36:49,877 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1518 transitions. Word has length 24 [2021-11-09 09:36:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:49,878 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1518 transitions. [2021-11-09 09:36:49,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1518 transitions. [2021-11-09 09:36:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:36:49,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:49,884 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:49,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:50,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:50,097 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr52REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1075877825, now seen corresponding path program 1 times [2021-11-09 09:36:50,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:50,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296537944] [2021-11-09 09:36:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:50,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:50,099 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:50,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 09:36:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:36:50,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:50,397 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 09:36:50,538 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 09:36:50,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:50,705 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 09:36:50,705 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:50,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296537944] [2021-11-09 09:36:50,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296537944] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:50,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:50,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 09:36:50,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879229151] [2021-11-09 09:36:50,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:50,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:50,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:50,708 INFO L87 Difference]: Start difference. First operand 1298 states and 1518 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:53,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:53,241 INFO L93 Difference]: Finished difference Result 1888 states and 2232 transitions. [2021-11-09 09:36:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-09 09:36:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:53,250 INFO L225 Difference]: With dead ends: 1888 [2021-11-09 09:36:53,250 INFO L226 Difference]: Without dead ends: 1888 [2021-11-09 09:36:53,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-11-09 09:36:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1294. [2021-11-09 09:36:53,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 805 states have (on average 1.8496894409937887) internal successors, (1489), 1283 states have internal predecessors, (1489), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:36:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1510 transitions. [2021-11-09 09:36:53,281 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1510 transitions. Word has length 38 [2021-11-09 09:36:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:53,282 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1510 transitions. [2021-11-09 09:36:53,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:36:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1510 transitions. [2021-11-09 09:36:53,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:36:53,283 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:53,284 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:53,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-09 09:36:53,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:36:53,496 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr53REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:36:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:53,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1075877826, now seen corresponding path program 1 times [2021-11-09 09:36:53,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:36:53,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263174928] [2021-11-09 09:36:53,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:53,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:36:53,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:36:53,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:36:53,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 09:36:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:36:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:53,889 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 09:36:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:54,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:36:54,742 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 09:36:54,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:36:54,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263174928] [2021-11-09 09:36:54,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263174928] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:54,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:54,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 09:36:54,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480470314] [2021-11-09 09:36:54,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:54,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:36:54,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:54,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:54,745 INFO L87 Difference]: Start difference. First operand 1294 states and 1510 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:02,383 INFO L93 Difference]: Finished difference Result 2013 states and 2334 transitions. [2021-11-09 09:37:02,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:37:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-09 09:37:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:02,393 INFO L225 Difference]: With dead ends: 2013 [2021-11-09 09:37:02,393 INFO L226 Difference]: Without dead ends: 2013 [2021-11-09 09:37:02,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:37:02,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2013 states. [2021-11-09 09:37:02,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2013 to 1290. [2021-11-09 09:37:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 805 states have (on average 1.839751552795031) internal successors, (1481), 1279 states have internal predecessors, (1481), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1502 transitions. [2021-11-09 09:37:02,419 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1502 transitions. Word has length 38 [2021-11-09 09:37:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:02,419 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1502 transitions. [2021-11-09 09:37:02,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1502 transitions. [2021-11-09 09:37:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 09:37:02,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:02,421 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:02,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-09 09:37:02,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:02,634 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:02,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1047493696, now seen corresponding path program 1 times [2021-11-09 09:37:02,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:02,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23411100] [2021-11-09 09:37:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:02,636 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:02,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:02,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:02,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 09:37:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:03,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:37:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:03,277 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 09:37:03,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:03,446 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 09:37:03,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:03,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23411100] [2021-11-09 09:37:03,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23411100] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:03,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:03,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 09:37:03,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955014586] [2021-11-09 09:37:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:37:03,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:37:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:37:03,448 INFO L87 Difference]: Start difference. First operand 1290 states and 1502 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:03,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:03,523 INFO L93 Difference]: Finished difference Result 1278 states and 1482 transitions. [2021-11-09 09:37:03,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:37:03,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-09 09:37:03,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:03,529 INFO L225 Difference]: With dead ends: 1278 [2021-11-09 09:37:03,529 INFO L226 Difference]: Without dead ends: 1278 [2021-11-09 09:37:03,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:03,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-09 09:37:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1278. [2021-11-09 09:37:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 793 states have (on average 1.8423707440100883) internal successors, (1461), 1267 states have internal predecessors, (1461), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1482 transitions. [2021-11-09 09:37:03,551 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1482 transitions. Word has length 56 [2021-11-09 09:37:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:03,551 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1482 transitions. [2021-11-09 09:37:03,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1482 transitions. [2021-11-09 09:37:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 09:37:03,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:03,553 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:03,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:03,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:03,769 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1905952116, now seen corresponding path program 1 times [2021-11-09 09:37:03,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:03,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437958961] [2021-11-09 09:37:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:03,771 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:03,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:03,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 09:37:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:37:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:04,328 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 09:37:04,333 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 09:37:05,220 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:37:05,221 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 09:37:05,228 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:37:05,228 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 09:37:05,260 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 09:37:05,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:12,109 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 09:37:12,109 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:12,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437958961] [2021-11-09 09:37:12,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437958961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:12,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:12,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 09:37:12,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571918264] [2021-11-09 09:37:12,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:37:12,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:37:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 09:37:12,112 INFO L87 Difference]: Start difference. First operand 1278 states and 1482 transitions. Second operand has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:29,195 INFO L93 Difference]: Finished difference Result 2073 states and 2523 transitions. [2021-11-09 09:37:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:37:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-11-09 09:37:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:29,205 INFO L225 Difference]: With dead ends: 2073 [2021-11-09 09:37:29,205 INFO L226 Difference]: Without dead ends: 2073 [2021-11-09 09:37:29,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-09 09:37:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-11-09 09:37:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1240. [2021-11-09 09:37:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 793 states have (on average 1.794451450189155) internal successors, (1423), 1229 states have internal predecessors, (1423), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1444 transitions. [2021-11-09 09:37:29,226 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1444 transitions. Word has length 64 [2021-11-09 09:37:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:29,227 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1444 transitions. [2021-11-09 09:37:29,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1444 transitions. [2021-11-09 09:37:29,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:37:29,228 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:29,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:29,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-09 09:37:29,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:29,457 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr76REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -655072709, now seen corresponding path program 1 times [2021-11-09 09:37:29,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:29,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038440174] [2021-11-09 09:37:29,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:29,459 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:29,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:29,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:29,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 09:37:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:29,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:37:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:30,140 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 09:37:30,160 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 09:37:30,200 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 09:37:30,213 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 09:37:30,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:30,348 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 09:37:30,348 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:30,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038440174] [2021-11-09 09:37:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038440174] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:30,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:30,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 09:37:30,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431417902] [2021-11-09 09:37:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:37:30,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:37:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:37:30,350 INFO L87 Difference]: Start difference. First operand 1240 states and 1444 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:33,831 INFO L93 Difference]: Finished difference Result 1239 states and 1443 transitions. [2021-11-09 09:37:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:37:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-09 09:37:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:33,853 INFO L225 Difference]: With dead ends: 1239 [2021-11-09 09:37:33,853 INFO L226 Difference]: Without dead ends: 1239 [2021-11-09 09:37:33,853 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:37:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-11-09 09:37:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1239. [2021-11-09 09:37:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 793 states have (on average 1.7931904161412358) internal successors, (1422), 1228 states have internal predecessors, (1422), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1443 transitions. [2021-11-09 09:37:33,872 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1443 transitions. Word has length 69 [2021-11-09 09:37:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:33,873 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1443 transitions. [2021-11-09 09:37:33,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1443 transitions. [2021-11-09 09:37:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 09:37:33,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:33,875 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:33,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:34,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:34,090 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr77REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash -655072708, now seen corresponding path program 1 times [2021-11-09 09:37:34,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:34,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834222561] [2021-11-09 09:37:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:34,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:34,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:34,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 09:37:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:37:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:34,776 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 09:37:34,803 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 09:37:34,818 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 09:37:34,888 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 09:37:34,891 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 09:37:34,915 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 09:37:34,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:35,282 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 09:37:35,282 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:35,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834222561] [2021-11-09 09:37:35,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834222561] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:35,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:35,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 09:37:35,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638832312] [2021-11-09 09:37:35,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:37:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:35,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:37:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:35,283 INFO L87 Difference]: Start difference. First operand 1239 states and 1443 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:46,801 INFO L93 Difference]: Finished difference Result 1238 states and 1442 transitions. [2021-11-09 09:37:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:37:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-09 09:37:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:46,808 INFO L225 Difference]: With dead ends: 1238 [2021-11-09 09:37:46,808 INFO L226 Difference]: Without dead ends: 1238 [2021-11-09 09:37:46,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:37:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-11-09 09:37:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1238. [2021-11-09 09:37:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 792 states have (on average 1.7941919191919191) internal successors, (1421), 1227 states have internal predecessors, (1421), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1442 transitions. [2021-11-09 09:37:46,829 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1442 transitions. Word has length 69 [2021-11-09 09:37:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:46,829 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1442 transitions. [2021-11-09 09:37:46,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:37:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1442 transitions. [2021-11-09 09:37:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 09:37:46,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:46,831 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:46,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:47,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:47,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:47,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1548642594, now seen corresponding path program 1 times [2021-11-09 09:37:47,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:47,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [323662832] [2021-11-09 09:37:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:47,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:47,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:47,037 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:47,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 09:37:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:47,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:37:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:47,747 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 09:37:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:47,983 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 09:37:47,984 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:47,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [323662832] [2021-11-09 09:37:47,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [323662832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 09:37:47,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:37:47,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 09:37:47,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566885260] [2021-11-09 09:37:47,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:37:47,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:47,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:37:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:37:47,985 INFO L87 Difference]: Start difference. First operand 1238 states and 1442 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:48,102 INFO L93 Difference]: Finished difference Result 1248 states and 1455 transitions. [2021-11-09 09:37:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:37:48,103 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-09 09:37:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:48,109 INFO L225 Difference]: With dead ends: 1248 [2021-11-09 09:37:48,109 INFO L226 Difference]: Without dead ends: 1248 [2021-11-09 09:37:48,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:37:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-11-09 09:37:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2021-11-09 09:37:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 800 states have (on average 1.79125) internal successors, (1433), 1236 states have internal predecessors, (1433), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 09:37:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1455 transitions. [2021-11-09 09:37:48,132 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1455 transitions. Word has length 77 [2021-11-09 09:37:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:48,133 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 1455 transitions. [2021-11-09 09:37:48,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1455 transitions. [2021-11-09 09:37:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 09:37:48,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:48,134 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:48,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:48,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:48,349 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:48,349 INFO L85 PathProgramCache]: Analyzing trace with hash 107741602, now seen corresponding path program 1 times [2021-11-09 09:37:48,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:48,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868602338] [2021-11-09 09:37:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:48,350 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:48,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:48,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:48,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 09:37:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:37:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:49,267 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 09:37:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:49,664 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 09:37:49,665 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:49,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868602338] [2021-11-09 09:37:49,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868602338] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:49,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:49,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 09:37:49,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751804697] [2021-11-09 09:37:49,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:37:49,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:37:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:37:49,674 INFO L87 Difference]: Start difference. First operand 1248 states and 1455 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:50,162 INFO L93 Difference]: Finished difference Result 1262 states and 1473 transitions. [2021-11-09 09:37:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:37:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-09 09:37:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:50,169 INFO L225 Difference]: With dead ends: 1262 [2021-11-09 09:37:50,169 INFO L226 Difference]: Without dead ends: 1258 [2021-11-09 09:37:50,169 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-09 09:37:50,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1254. [2021-11-09 09:37:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 806 states have (on average 1.7878411910669976) internal successors, (1441), 1242 states have internal predecessors, (1441), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 09:37:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1463 transitions. [2021-11-09 09:37:50,201 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1463 transitions. Word has length 79 [2021-11-09 09:37:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1463 transitions. [2021-11-09 09:37:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1463 transitions. [2021-11-09 09:37:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 09:37:50,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:50,203 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:50,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:50,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:50,423 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:50,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1478677154, now seen corresponding path program 2 times [2021-11-09 09:37:50,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:50,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394719657] [2021-11-09 09:37:50,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:50,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:50,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:50,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:50,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 09:37:51,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:37:51,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:51,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:52,201 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394719657] [2021-11-09 09:37:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394719657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:52,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:52,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 09:37:52,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319960152] [2021-11-09 09:37:52,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:37:52,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:37:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:37:52,203 INFO L87 Difference]: Start difference. First operand 1254 states and 1463 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:53,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:53,999 INFO L93 Difference]: Finished difference Result 1282 states and 1501 transitions. [2021-11-09 09:37:54,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 09:37:54,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-09 09:37:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:54,005 INFO L225 Difference]: With dead ends: 1282 [2021-11-09 09:37:54,005 INFO L226 Difference]: Without dead ends: 1278 [2021-11-09 09:37:54,006 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:37:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-11-09 09:37:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1266. [2021-11-09 09:37:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 818 states have (on average 1.7811735941320292) internal successors, (1457), 1254 states have internal predecessors, (1457), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 09:37:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1479 transitions. [2021-11-09 09:37:54,035 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1479 transitions. Word has length 83 [2021-11-09 09:37:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:54,036 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1479 transitions. [2021-11-09 09:37:54,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:37:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1479 transitions. [2021-11-09 09:37:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 09:37:54,037 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:54,038 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:54,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:54,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:37:54,257 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:37:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:54,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2053043362, now seen corresponding path program 3 times [2021-11-09 09:37:54,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:37:54,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146949414] [2021-11-09 09:37:54,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:54,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:37:54,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:37:54,259 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:37:54,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-09 09:37:55,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 09:37:55,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:37:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:56,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:37:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:37:58,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:37:58,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146949414] [2021-11-09 09:37:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146949414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:37:58,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:58,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-09 09:37:58,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035051109] [2021-11-09 09:37:58,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:37:58,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:37:58,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:37:58,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:37:58,622 INFO L87 Difference]: Start difference. First operand 1266 states and 1479 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:38:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:07,282 INFO L93 Difference]: Finished difference Result 1322 states and 1563 transitions. [2021-11-09 09:38:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 09:38:07,283 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 91 [2021-11-09 09:38:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:07,287 INFO L225 Difference]: With dead ends: 1322 [2021-11-09 09:38:07,288 INFO L226 Difference]: Without dead ends: 1316 [2021-11-09 09:38:07,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1377, Invalid=2783, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:38:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-11-09 09:38:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1290. [2021-11-09 09:38:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 842 states have (on average 1.7672209026128265) internal successors, (1488), 1278 states have internal predecessors, (1488), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 09:38:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1510 transitions. [2021-11-09 09:38:07,315 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1510 transitions. Word has length 91 [2021-11-09 09:38:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:07,316 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1510 transitions. [2021-11-09 09:38:07,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:38:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1510 transitions. [2021-11-09 09:38:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 09:38:07,317 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:07,318 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:07,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:07,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:38:07,534 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:38:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1896954018, now seen corresponding path program 4 times [2021-11-09 09:38:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:38:07,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523628751] [2021-11-09 09:38:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:38:07,536 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:38:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:38:07,537 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:38:07,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-09 09:38:08,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:38:08,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 09:38:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:09,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 09:38:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:38:13,905 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 09:38:13,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523628751] [2021-11-09 09:38:13,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523628751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 09:38:13,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:13,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-09 09:38:13,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816964842] [2021-11-09 09:38:13,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:38:13,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 09:38:13,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:38:13,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:38:13,909 INFO L87 Difference]: Start difference. First operand 1290 states and 1510 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:38:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:29,235 INFO L93 Difference]: Finished difference Result 1382 states and 1630 transitions. [2021-11-09 09:38:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 09:38:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 107 [2021-11-09 09:38:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:29,242 INFO L225 Difference]: With dead ends: 1382 [2021-11-09 09:38:29,242 INFO L226 Difference]: Without dead ends: 1378 [2021-11-09 09:38:29,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=4503, Invalid=14679, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 09:38:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-11-09 09:38:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1320. [2021-11-09 09:38:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 872 states have (on average 1.7591743119266054) internal successors, (1534), 1308 states have internal predecessors, (1534), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 09:38:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1556 transitions. [2021-11-09 09:38:29,278 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1556 transitions. Word has length 107 [2021-11-09 09:38:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:29,279 INFO L470 AbstractCegarLoop]: Abstraction has 1320 states and 1556 transitions. [2021-11-09 09:38:29,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-09 09:38:29,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1556 transitions. [2021-11-09 09:38:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-09 09:38:29,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:29,280 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:29,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:29,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 09:38:29,498 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 635 more)] === [2021-11-09 09:38:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1816175650, now seen corresponding path program 5 times [2021-11-09 09:38:29,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 09:38:29,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376319381] [2021-11-09 09:38:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:38:29,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 09:38:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 09:38:29,500 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 09:38:29,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77e33b47-60cd-4f2a-84c3-4e59c2b4579b/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-09 09:38:31,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-09 09:38:31,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:38:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:31,297 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 09:38:31,578 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-09 09:38:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-09 09:38:31,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-09 09:38:31,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24